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Mar 30, 2023
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Atoms, Elements, and Compounds: Easy Science for KS3 and Year 7
rosie ๐ซ๐งฌ
@nxallsc1ence
Compounds and Chemical Bonding
This page delves deeper into the nature of compounds and chemical bonding, essential for understanding elements and periodic table basics.
Compounds are formed when two or more different elements chemically bond together. The resulting compound has different physical properties compared to its constituent elements. This transformation is exemplified by the formation of water from oxygen and hydrogen gases.
Example: Oxygen + Hydrogen โ Water
Compounds are typically difficult to separate and require chemical reactions to break them down into their constituent elements. This stability is due to the strong chemical bonds between the atoms.
When naming compounds, there's a specific convention to follow:
- The metal element is named first.
- The non-metal element follows, often with its name slightly modified .
Highlight: The chemical formula of a compound provides crucial information about its composition, indicating the number of atoms of each element present in the molecule.
Vocabulary: Chemical formula - A symbolic representation of a compound that shows the types and quantities of atoms present in a single molecule.
Polymers and Group 1 Elements
This page covers polymers and Group 1 elements of the periodic table, providing insights into chemical bonding in compounds and polymer properties.
Polymers are long chains of repeating groups of atoms. They can be either natural or synthetic.
Definition: Polymers are large molecules composed of many repeating subunits.
Natural polymers include:
- Cellulose
- Starch
- Rubber
Synthetic polymers include:
- Polythene
- Polystyrene
- Nylon
Highlight: Polymers can have hundreds or even thousands of repeating units, giving them unique properties.
The page then shifts focus to Group 1 elements, also known as alkali metals. These elements share properties typical of metals, such as being shiny when freshly cut and conducting electricity and heat well.
Vocabulary: Alkali metals - The elements in Group 1 of the periodic table, characterized by high reactivity and softness.
Group 1 metals have some distinctive characteristics:
- They are softer than most metals.
- They have lower boiling and melting points compared to other metals.
- They react with water to form alkaline solutions.
Example: Lithium + Water โ Lithium hydroxide + Hydrogen
As you move down Group 1 in the periodic table:
- The reactivity of the elements increases.
- The boiling and melting points of the elements decrease.
Periodic Table Groups and Periods
This final page explores the structure of the periodic table and focuses on specific groups, particularly the noble gases and halogens.
The periodic table is organized into groups and periods . This arrangement helps in understanding the periodic table easily and predicting element properties.
Definition: Groups are vertical columns in the periodic table, while periods are horizontal rows.
Group 0, also known as the noble gases, consists of non-metallic elements with low melting and boiling points. All noble gases are in a gaseous state at room temperature.
Highlight: Noble gases are known for their extremely low reactivity.
Characteristics of noble gases:
- As you move down the group, the boiling point of the elements decreases.
- They emit brightly colored light when electricity is passed through them.
The page also introduces the halogen group, which includes elements like fluorine, chlorine, bromine, and iodine.
Vocabulary: Halogens - A group of highly reactive non-metallic elements in Group 17 of the periodic table.
The reactivity of halogens decreases as you move down the group, with fluorine being the most reactive and iodine the least.
Example: The order of reactivity in halogens : Fluorine > Chlorine > Bromine > Iodine
This comprehensive overview of the periodic table structure and element groups provides a solid foundation for further study in chemistry and helps students understand the periodic table easily.
Elements and Atoms: The Building Blocks of Matter
This page introduces the fundamental concepts of elements and atoms, providing a solid foundation for understanding atomic structure and the periodic table basics.
Elements are substances composed of only one type of atom. They are the basic building blocks of all matter and are organized in the periodic table. Each element has a unique symbol that is universally recognized across languages.
Atoms are the smallest units of an element that retain its properties. There are approximately 100 different elements, each with its own distinct type of atom.
Compounds are formed when two or more different elements chemically bond together. These compounds have different physical properties compared to their constituent elements.
Definition: An element is a substance made up of only one type of atom.
Highlight: The periodic table organizes all known elements, each with its unique symbol.
Example: Water is a compound formed from the elements hydrogen and oxygen.
When naming compounds, the metal element is typically named first, followed by the non-metal element. The chemical formula of a compound indicates the number of atoms of each element present in the molecule.
Vocabulary: Chemical formula - A representation of a compound using element symbols and numerical subscripts to show the ratio of atoms.
Can't find what you're looking for? Explore other subjects.
Students love us โ 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 itโs very much worth it and youโll 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 donโt get it!!! In the end I think itโs worth it ๐๐ โ ๏ธAlso DID I MENTION ITS FREEE YOU DONโT HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLYโ๏ธโ๏ธโ ๏ธ
Thomas R
iOS user
Knowunity is the BEST app Iโve 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 help๐ค๐ค
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.๐๐ฉท๐
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 ๐๐๐ฒ๐ค๐โจ๐๐ฎ
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 Iโve 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 itโs very much worth it and youโll 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 donโt get it!!! In the end I think itโs worth it ๐๐ โ ๏ธAlso DID I MENTION ITS FREEE YOU DONโT HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLYโ๏ธโ๏ธโ ๏ธ
Thomas R
iOS user
Knowunity is the BEST app Iโve 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 help๐ค๐ค
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.๐๐ฉท๐
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 ๐๐๐ฒ๐ค๐โจ๐๐ฎ
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 Iโve seen! Geometry too!
Paul T
iOS user
Atoms, Elements, and Compounds: Easy Science for KS3 and Year 7
rosie ๐ซ๐งฌ
@nxallsc1ence
Atoms, elements, and compoundsform the foundation of chemistry. This summary explores their definitions, properties, and relationships, as well as the characteristics of Group 1 elements and noble gases. Key topics include the structure of atoms, formation of compounds, and... Show more
Compounds and Chemical Bonding
This page delves deeper into the nature of compounds and chemical bonding, essential for understanding elements and periodic table basics.
Compounds are formed when two or more different elements chemically bond together. The resulting compound has different physical properties compared to its constituent elements. This transformation is exemplified by the formation of water from oxygen and hydrogen gases.
Example: Oxygen + Hydrogen โ Water
Compounds are typically difficult to separate and require chemical reactions to break them down into their constituent elements. This stability is due to the strong chemical bonds between the atoms.
When naming compounds, there's a specific convention to follow:
- The metal element is named first.
- The non-metal element follows, often with its name slightly modified .
Highlight: The chemical formula of a compound provides crucial information about its composition, indicating the number of atoms of each element present in the molecule.
Vocabulary: Chemical formula - A symbolic representation of a compound that shows the types and quantities of atoms present in a single molecule.
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
Polymers and Group 1 Elements
This page covers polymers and Group 1 elements of the periodic table, providing insights into chemical bonding in compounds and polymer properties.
Polymers are long chains of repeating groups of atoms. They can be either natural or synthetic.
Definition: Polymers are large molecules composed of many repeating subunits.
Natural polymers include:
- Cellulose
- Starch
- Rubber
Synthetic polymers include:
- Polythene
- Polystyrene
- Nylon
Highlight: Polymers can have hundreds or even thousands of repeating units, giving them unique properties.
The page then shifts focus to Group 1 elements, also known as alkali metals. These elements share properties typical of metals, such as being shiny when freshly cut and conducting electricity and heat well.
Vocabulary: Alkali metals - The elements in Group 1 of the periodic table, characterized by high reactivity and softness.
Group 1 metals have some distinctive characteristics:
- They are softer than most metals.
- They have lower boiling and melting points compared to other metals.
- They react with water to form alkaline solutions.
Example: Lithium + Water โ Lithium hydroxide + Hydrogen
As you move down Group 1 in the periodic table:
- The reactivity of the elements increases.
- The boiling and melting points of the elements decrease.
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
Periodic Table Groups and Periods
This final page explores the structure of the periodic table and focuses on specific groups, particularly the noble gases and halogens.
The periodic table is organized into groups and periods . This arrangement helps in understanding the periodic table easily and predicting element properties.
Definition: Groups are vertical columns in the periodic table, while periods are horizontal rows.
Group 0, also known as the noble gases, consists of non-metallic elements with low melting and boiling points. All noble gases are in a gaseous state at room temperature.
Highlight: Noble gases are known for their extremely low reactivity.
Characteristics of noble gases:
- As you move down the group, the boiling point of the elements decreases.
- They emit brightly colored light when electricity is passed through them.
The page also introduces the halogen group, which includes elements like fluorine, chlorine, bromine, and iodine.
Vocabulary: Halogens - A group of highly reactive non-metallic elements in Group 17 of the periodic table.
The reactivity of halogens decreases as you move down the group, with fluorine being the most reactive and iodine the least.
Example: The order of reactivity in halogens : Fluorine > Chlorine > Bromine > Iodine
This comprehensive overview of the periodic table structure and element groups provides a solid foundation for further study in chemistry and helps students understand the periodic table easily.
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
Elements and Atoms: The Building Blocks of Matter
This page introduces the fundamental concepts of elements and atoms, providing a solid foundation for understanding atomic structure and the periodic table basics.
Elements are substances composed of only one type of atom. They are the basic building blocks of all matter and are organized in the periodic table. Each element has a unique symbol that is universally recognized across languages.
Atoms are the smallest units of an element that retain its properties. There are approximately 100 different elements, each with its own distinct type of atom.
Compounds are formed when two or more different elements chemically bond together. These compounds have different physical properties compared to their constituent elements.
Definition: An element is a substance made up of only one type of atom.
Highlight: The periodic table organizes all known elements, each with its unique symbol.
Example: Water is a compound formed from the elements hydrogen and oxygen.
When naming compounds, the metal element is typically named first, followed by the non-metal element. The chemical formula of a compound indicates the number of atoms of each element present in the molecule.
Vocabulary: Chemical formula - A representation of a compound using element symbols and numerical subscripts to show the ratio of atoms.
Can't find what you're looking for? Explore other subjects.
Students love us โ 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 itโs very much worth it and youโll 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 donโt get it!!! In the end I think itโs worth it ๐๐ โ ๏ธAlso DID I MENTION ITS FREEE YOU DONโT HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLYโ๏ธโ๏ธโ ๏ธ
Thomas R
iOS user
Knowunity is the BEST app Iโve 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 help๐ค๐ค
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.๐๐ฉท๐
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 ๐๐๐ฒ๐ค๐โจ๐๐ฎ
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 Iโve 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 itโs very much worth it and youโll 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 donโt get it!!! In the end I think itโs worth it ๐๐ โ ๏ธAlso DID I MENTION ITS FREEE YOU DONโT HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLYโ๏ธโ๏ธโ ๏ธ
Thomas R
iOS user
Knowunity is the BEST app Iโve 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 help๐ค๐ค
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.๐๐ฉท๐
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 ๐๐๐ฒ๐ค๐โจ๐๐ฎ
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 Iโve seen! Geometry too!
Paul T
iOS user