Bohr Model Notes.

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Presentation transcript:

Bohr Model Notes

Bohr Models Used to show arrangement of electrons Electrons are placed on the inner shell first Once full, extra electrons are placed in the next shells Maximum number of electrons on shells 1st = 2 electrons 2nd = 8 electrons 3rd = 8 electrons After element 18, shells fill differently so you might hear 2, 8, 18 in higher level chemistry classes After element 18 the shells fill differently

Periodic Table Tips The periodic table can help you quickly complete the Bohr model The number of periods shows you the number of shells The number of groups shows you the number of electrons in the outer shell

Bohr Model Practice Fill in the blanks below. Phosphorus Symbol: P Atomic Number: 15 Atomic Mass: 31 Protons: 15 Neutrons: 31-15 = 16 Electrons: 15 Create a Bohr Model for Phosphorus

Periodic Table – Use the new Tips

Bohr Model Practice Fill in the blanks below. Phosphorus Symbol: P Atomic Number: 15 Atomic Mass: 31 Protons: 15 Neutrons: 31-15 = 16 Electrons: 15 Create a Bohr Model for Phosphorus