The Bohr Model and Electron Dot Diagrams

Science 10

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

Energy Levels

The number of electrons to fill each of the shells is:28818183232

Bohr Model – Potassium19 protons, 19 electrons, 20 neutrons

19-p20-n

Bohr Model

Choose four different atoms from the periodic table (with at least 3 electron shells)

Draw the Bohr Model Diagram for each

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

Electron Dot Diagrams

Beryllium 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

Electron Dot Diagrams

Complete Electron Dot Diagrams for the first 20 elements