CHEM 2E03 Chapter Notes - Chapter 1: Atomic Orbital, Net Force, Partial Charge

• School: McMaster University
• Department: Chemistry
• Course: CHEM 2E03
• Professor: Dr.S

Document Summary

Constitutional isomers: same molecular formula but different physical properties and different names. Valence: number of bonds usually formed by each element. Monovalent: forms one bond (eg. hydrogen, halogens) 1. 3 electrons, bonds, and lewis structures covalent bond: result of two atoms sharing a pair of electrons (eg. h-h) 1. 5 induction and polar covalent bonds electronegativity: measure of the ability of an atom to attract electrons: en difference < 0. 5 : covalent bond, 0. 5 < en difference < 1. 7 : polar covalent bond. Induction: withdrawal of e"s towards one atom, shown with arrow w/ a cross. Formation of partial pos/neg charges, shown by + / : en difference > 1. 7: ionic bond (e"s not shared) Like waves, when atomic orbitals overlap, they can interfere constructively or destructively. A bond is the sharing of electron density btwn 2 atoms as a result of constructive interference of their atomic orbitals: eg. Overlap of 1s atomic orbitals of 2 h atoms.