Chapter 9 Chemical Bonding andMolecular Structure
1 Chapter 9 Chemical Bonding and Molecular Structure
What is chemical bonding?Chemical bonds refer to the main, direct, andstrong forces between atoms and ionsWhat chemical bonds types are there?covalentbondsionic bondsmetal bonds
2 What is chemical bonding? Chemical bonds refer to the main, direct, and strong forces between atoms and ions. What chemical bonds types are there? • covalent bonds • ionic bonds • metal bonds
Three objectives:Covalent bonding and atomic crystalslonic bonds andionic substancesIntermolecularforcesandmolecularcrystals
3 Three objectives: ◼ Covalent bonding and atomic crystals ◼ Ionic bonds and ionic substances ◼ Intermolecular forces and molecular crystals
9-1 Covalent bondingand atomic crystals9-1-1 Valence bonding theory9-1-2Hybridization9-1-3Valenceshell electronpairrepulsion(VSEPR)9-1-4 Molecular Orbit Theory
4 9-1 Covalent bonding and atomic crystals 9-1-1 Valence bonding theory 9-1-2 Hybridization 9-1-3 Valence shell electron pair repulsion （VSEPR） 9-1-4 Molecular Orbit Theory
Ouestion1:How do molecules form from atoms ofelements withthesameor closeelectronegativity?Why the hydrogen molecule exists as H,instead of H3 or any other molecularformula?
5 Question 1: How do molecules form from atoms of elements with the same or close electronegativity? Why the hydrogen molecule exists as H2 instead of H3 or any other molecular formula?