1. The Bohr Model and Electron Dot Diagrams
Science 10

2. The Bohr Model
Protons and Neutrons are confined to the nucleus of an atom and can be determined using the atomic number and atomic weight of an atom
The electrons orbit the nucleus in shells or energy levels
When an energy level is full, any additional electrons will fill the next shell

3. Energy Levels The number of electrons to fill each of the shells is: 28 18 32

4. Bohr Model – Potassium 19 protons, 19 electrons, 20 neutrons

5. Bohr Model
Choose four different atoms from the periodic table (with at least 3 electron shells)
Draw the Bohr Model Diagram for each

6. Electron Dot Diagrams
When it comes to chemical bonding, we are only interested in the valance electrons so we simplify the Bohr Diagrams into an Electron Dot Diagram
This model uses dots to represent the valance electrons and ignores any electrons in the inner shells

7. Be S Electron Dot Diagrams Beryllium Sulphur 4 electrons
2 in the first shell
2 in the valance shell
Sulphur
16 electrons
2 in the first shell
8 in the second shell
6 in the valance shell Be S

8. Electron Dot Diagrams
Complete Electron Dot Diagrams for the first 20 elements