covalent bonding shapes
Overview
This lesson explores covalent bonding, a fundamental type of chemical bond formed by the sharing of electrons between non-metal atoms. We will delve into the factors influencing bond formation, different types of covalent bonds, and how the Valence Shell Electron Pair Repulsion (VSEPR) theory predicts the three-dimensional shapes of molecules.
Introduction to Covalent Bonding
Covalent bonding primarily occurs between **non-metal atoms** where there is a small or negligible difference in electronegativity. Instead of transferring electrons (as in ionic bonding), atoms achieve a stable electron configuration, typically an **octet**, by sharing valence electrons. This shari...
Unlock 5 More Sections
Sign up free to access the complete notes, key concepts, and exam tips for this topic.
No credit card required · Free forever
Key Concepts
- Covalent Bond: A chemical bond formed by the sharing of one or more pairs of electrons between two atoms.
- Octet Rule: The tendency of atoms to achieve a stable electron configuration with eight valence electrons (or two for hydrogen) by forming chemical bonds.
- Electronegativity: A measure of the ability of an atom in a chemical compound to attract electrons towards itself.
- VSEPR Theory: Valence Shell Electron Pair Repulsion theory, which predicts molecular geometry based on the repulsion between electron pairs in the valence shell of the central atom.
- +3 more (sign up to view)
Exam Tips
- →Always draw the Lewis structure first when asked to predict molecular shape or bond angles. This helps identify lone pairs and bonding pairs correctly.
- →Remember the order of repulsion: Lone pair-lone pair > Lone pair-bonding pair > Bonding pair-bonding pair. This explains deviations from ideal bond angles.
- +3 more tips (sign up)
More Chemistry Notes