Covalent (Type 3) Bonding Basics
In covalent bonding, atoms share electrons (either evenly or unevenly) to achieve stability by completing their octet. When atoms form covalent bonds, they create a molecule rather than an ionic compound. Unlike ionic compounds, covalent compounds don't simplify and carry no overall charge.
The key differences between ionic and covalent compounds are significant. Ionic compounds form through electron exchange between cations and anions, conduct electricity when dissolved in water, and are called formula units. Covalent compounds form through electron sharing, create unique molecular structures, and don't conduct electricity in solution.
You can determine bond type by calculating the electronegativity difference between elements. When the difference is less than 0.4, the bond is purely covalent. A difference between 0.4 and 1.8 creates a polar covalent bond. Anything above 1.8 results in an ionic bond.
Quick Tip: Think of covalent bonding as a partnership where electrons are shared, while ionic bonding is more like a complete transfer of electrons from one atom to another.
