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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.

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Presentation on theme: "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."— Presentation transcript:

1 Bohr Model Notes

2 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 – 1 st = 2 electrons – 2 nd = 8 electrons – 3 rd = 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

3 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

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

6 Periodic Table – Use the new Tips

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


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