Subjects

Careers

Open the App

Subjects

Chemie

Atomaufbau und Zusammensetzung

Massenzahl

339

•

Jun 26, 2025

•

6 pages

Atoms and Chemistry Fun: Worksheets and Notes for Kids

user profile picture

Olivia Churcher

@oliviachurcher

Discover the amazing world of atoms with our easy worksheets and notes! Learn about atom structures and subatomic particles with cool diagrams. Explore how ionic and covalent bonds work and see differences and similarities. Need help? Check our answer key! Also, find out how temperature and other factors affect chemical reactions. Perfect for Class 9 and 10 students!

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Chemical Bonding

There are four main types of chemical bonding: covalent molecularandnetworkmolecular and network, ionic, and metallic. Each type has distinct properties affecting melting point, boiling point, electrical conductivity, and solubility in water.

Definition: Covalent bonding is the electrostatic force of attraction between two positive nuclei and a shared pair of electrons.

Definition: Ionic bonding is the electrostatic force of attraction between oppositely charged ions.

Definition: Metallic bonding is the electrostatic force of attraction between positively charged ions and delocalized electrons.

The properties of substances are directly related to their bonding type. For example, covalent molecular compounds typically have low melting and boiling points, while ionic compounds have high melting and boiling points.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Molecular Shapes

Molecules can adopt various shapes based on the arrangement of atoms and electron pairs. Common shapes include linear, tetrahedral, pyramidal, and angular.

Example: Water H2OH₂O has an angular shape, while methane CH4CH₄ is tetrahedral.

Understanding molecular shapes is crucial for predicting a molecule's polarity and reactivity, which are important concepts in National 5 Chemistry Unit 2.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Chemical Formulas

Chemical formulas represent the composition of compounds using element symbols and numerical subscripts. Prefixes like mono-, di-, and tri- indicate the number of atoms in a molecule.

Vocabulary: Valency is the combining power of an atom, determined by the number of electrons it can share or transfer.

To write a chemical formula:

  1. Write down the symbols of the elements.
  2. Note their valencies.
  3. Swap the valencies.
  4. Simplify if possible by dividing through.

This method is essential for N5 Chemistry bonding questions and understanding chemical reactions.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Rates of Reaction

Chemical reactions can be identified by various signs, including the formation of a precipitate, gas production, color change, or energy change.

Definition: An exothermic reaction releases heat, while an endothermic reaction absorbs heat.

Factors affecting reaction rates include:

  • Particle size
  • Concentration
  • Temperature
  • Presence of a catalyst

Highlight: The collision theory states that for a reaction to occur, particles must collide with sufficient energy and correct orientation.

The average rate of reaction is calculated using the formula:

Average rate = Change in Quantity / Change in Time

This concept is crucial for solving National 5 Chemistry Rates of reaction Questions and understanding the relationship between concentration and rate of reaction.

Example: To calculate the average rate of a reaction where 50g of product is formed in 10 minutes, use the formula: Average rate = 50g / 10 minutes = 5g/minute.

Understanding these concepts is essential for success in Nat 5 Chemistry Past Papers and mastering the N5 Chemistry course specification.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Page 6: Rates of Reaction

This page covers the factors affecting the rate of chemical reactions pdf, a crucial topic in chemistry. Signs of a chemical reaction include:

  • Formation of a precipitate
  • Gas production
  • Color change
  • Energy change

Definition: Exothermic reactions release heat, while endothermic reactions absorb heat.

The 5 factors that affect the rate of reaction are:

  1. Particle size
  2. Concentration
  3. Temperature
  4. Catalysts
  5. Surface area impliedimplied

Highlight: Collision theory states that for a reaction to occur, particles must collide with sufficient energy and correct orientation.

The average rate of reaction is calculated using the formula: Average rate = Change in Quantity / Change in Time

Understanding these concepts is crucial for factors affecting rate of reaction Class 12 and advanced chemistry studies.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Atomic Structure

The atom consists of three subatomic particles: protons, neutrons, and electrons. The nucleus contains protons and neutrons, while electrons orbit around it.

Vocabulary: Nuclide notation is a way of representing atoms using their mass number and atomic number.

Example: The nuclide notation for iron-56 is ²⁶⁵⁶Fe.

Isotopes are atoms of the same element with different numbers of neutrons. The relative atomic mass is the average mass of an atom of an element, taking into account the abundance of its isotopes.

Highlight: An atom is electrically neutral because it has an equal number of protons and electrons.



We thought you’d never ask...

What is the Knowunity AI companion?

Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.

Where can I download the Knowunity app?

You can download the app in the Google Play Store and in the Apple App Store.

Is Knowunity really free of charge?

You have the choice, we offer a 100% secure payment via PayPal or an Amazon gift card. There is no limit to how much you can earn.

Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.9/5

App Store

4.8/5

Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️

Thomas R

iOS user

Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades

Brad T

Android user

Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend

Aubrey

iOS user

Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀

Marco B

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️

Thomas R

iOS user

Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades

Brad T

Android user

Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend

Aubrey

iOS user

Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀

Marco B

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!

Paul T

iOS user

Chemie

Atomaufbau und Zusammensetzung

Massenzahl

 

Chemistry

•

339

•

Jun 26, 2025

•

6 pages

Atoms and Chemistry Fun: Worksheets and Notes for Kids

user profile picture

Olivia Churcher

@oliviachurcher

Discover the amazing world of atoms with our easy worksheets and notes! Learn about atom structures and subatomic particles with cool diagrams. Explore how ionic and covalent bonds work and see differences and similarities. Need help? Check our answer key! Also, find out how temperature and other factors affect chemical reactions. Perfect for Class 9 and 10 students!

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Chemical Bonding

There are four main types of chemical bonding: covalent molecularandnetworkmolecular and network, ionic, and metallic. Each type has distinct properties affecting melting point, boiling point, electrical conductivity, and solubility in water.

Definition: Covalent bonding is the electrostatic force of attraction between two positive nuclei and a shared pair of electrons.

Definition: Ionic bonding is the electrostatic force of attraction between oppositely charged ions.

Definition: Metallic bonding is the electrostatic force of attraction between positively charged ions and delocalized electrons.

The properties of substances are directly related to their bonding type. For example, covalent molecular compounds typically have low melting and boiling points, while ionic compounds have high melting and boiling points.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Molecular Shapes

Molecules can adopt various shapes based on the arrangement of atoms and electron pairs. Common shapes include linear, tetrahedral, pyramidal, and angular.

Example: Water H2OH₂O has an angular shape, while methane CH4CH₄ is tetrahedral.

Understanding molecular shapes is crucial for predicting a molecule's polarity and reactivity, which are important concepts in National 5 Chemistry Unit 2.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Chemical Formulas

Chemical formulas represent the composition of compounds using element symbols and numerical subscripts. Prefixes like mono-, di-, and tri- indicate the number of atoms in a molecule.

Vocabulary: Valency is the combining power of an atom, determined by the number of electrons it can share or transfer.

To write a chemical formula:

  1. Write down the symbols of the elements.
  2. Note their valencies.
  3. Swap the valencies.
  4. Simplify if possible by dividing through.

This method is essential for N5 Chemistry bonding questions and understanding chemical reactions.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Rates of Reaction

Chemical reactions can be identified by various signs, including the formation of a precipitate, gas production, color change, or energy change.

Definition: An exothermic reaction releases heat, while an endothermic reaction absorbs heat.

Factors affecting reaction rates include:

  • Particle size
  • Concentration
  • Temperature
  • Presence of a catalyst

Highlight: The collision theory states that for a reaction to occur, particles must collide with sufficient energy and correct orientation.

The average rate of reaction is calculated using the formula:

Average rate = Change in Quantity / Change in Time

This concept is crucial for solving National 5 Chemistry Rates of reaction Questions and understanding the relationship between concentration and rate of reaction.

Example: To calculate the average rate of a reaction where 50g of product is formed in 10 minutes, use the formula: Average rate = 50g / 10 minutes = 5g/minute.

Understanding these concepts is essential for success in Nat 5 Chemistry Past Papers and mastering the N5 Chemistry course specification.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Page 6: Rates of Reaction

This page covers the factors affecting the rate of chemical reactions pdf, a crucial topic in chemistry. Signs of a chemical reaction include:

  • Formation of a precipitate
  • Gas production
  • Color change
  • Energy change

Definition: Exothermic reactions release heat, while endothermic reactions absorb heat.

The 5 factors that affect the rate of reaction are:

  1. Particle size
  2. Concentration
  3. Temperature
  4. Catalysts
  5. Surface area impliedimplied

Highlight: Collision theory states that for a reaction to occur, particles must collide with sufficient energy and correct orientation.

The average rate of reaction is calculated using the formula: Average rate = Change in Quantity / Change in Time

Understanding these concepts is crucial for factors affecting rate of reaction Class 12 and advanced chemistry studies.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Atomic Structure

The atom consists of three subatomic particles: protons, neutrons, and electrons. The nucleus contains protons and neutrons, while electrons orbit around it.

Vocabulary: Nuclide notation is a way of representing atoms using their mass number and atomic number.

Example: The nuclide notation for iron-56 is ²⁶⁵⁶Fe.

Isotopes are atoms of the same element with different numbers of neutrons. The relative atomic mass is the average mass of an atom of an element, taking into account the abundance of its isotopes.

Highlight: An atom is electrically neutral because it has an equal number of protons and electrons.

We thought you’d never ask...

What is the Knowunity AI companion?

Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.

Where can I download the Knowunity app?

You can download the app in the Google Play Store and in the Apple App Store.

Is Knowunity really free of charge?

You have the choice, we offer a 100% secure payment via PayPal or an Amazon gift card. There is no limit to how much you can earn.

Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.9/5

App Store

4.8/5

Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️

Thomas R

iOS user

Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades

Brad T

Android user

Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend

Aubrey

iOS user

Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀

Marco B

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️

Thomas R

iOS user

Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades

Brad T

Android user

Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend

Aubrey

iOS user

Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀

Marco B

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!

Paul T

iOS user