Bohr Diagrams or Shell Models 11 Na Sodium 23 Bohr Diagrams or Shell Models - +11 Model of an atom which has a nucleus surrounded by electrons in their energy levels. Water sugar salt We are going to talk about bonding Bonding between atoms is CIM Why do 2h and OThere are several difference bond types in Chemistry. All are concerned with electrons. Intermolecular bonds occur between molecules (hydrogen bonding)

2-8-8-2 rule 2 8 8 2 Put the number of protons in the nucleus. First two electrons go in the first energy level or ring around the atom. The next eight go into the next energy level and so on… This works for the first 20 elements. 2 8 8 2 Water sugar salt We are going to talk about bonding Bonding between atoms is CIM Why do 2h and OThere are several difference bond types in Chemistry. All are concerned with electrons. Intermolecular bonds occur between molecules (hydrogen bonding)

Assignment 2-8-8-2 rule Hydrogen Helium Carbon Neon Chlorine Cl1- Nitrogen N3- Li1+ Magnesium Iron Water sugar salt We are going to talk about bonding Bonding between atoms is CIM Why do 2h and OThere are several difference bond types in Chemistry. All are concerned with electrons. Intermolecular bonds occur between molecules (hydrogen bonding)

Valence Electrons Electrons in the outermost ring are considered to be the most important because when two atoms come near one another it is these valence electrons and outer shells that interact. Water sugar salt We are going to talk about bonding Bonding between atoms is CIM Why do 2h and OThere are several difference bond types in Chemistry. All are concerned with electrons. Intermolecular bonds occur between molecules (hydrogen bonding)