Making Bohr Models These models show where the protons, neutrons, and electrons are located

Getting Started Bohr models show where the protons electrons and neutrons are found Find the number of protons, neutrons, and electrons using the atomic number and atomic mass

Making the Nucleus of Model Write the protons and neutrons in the center of the model (nucleus) Abbreviate the protons with ‘P’ and the neutrons with ‘N’ 17 P 18 N

Making the Electron Orbitals Place the appropriate number of electrons in each orbital according to the following rules: 1st – 2 total can fit 2nd – 8 total can fit 3rd – 18 total can fit 17 P 18 N

The Last Ring The last ring that you fill with electrons is called the valence shell The electrons in the valence shell are called valence electrons Valence electrons are very important when atoms combine to make compounds

Check Your Models! Make sure the number of protons and electrons are equal! Make sure you filled each orbital before moving on to the next!