HOW TO DRAW A BOHR MODEL

APE- Atomic #, Proton, Electron

NUCLEUS & SHELLS

• Draw nucleus with # of protons and neutrons
• Carbon is in the 2nd period, which makes it have two shells
• Draw 2 shells around nucles
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ELECTRONS

• Add the electrons
• Carbon has 6 electrons
• First shell can hold 2 electrons
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ADDING MORE

• The other 4 go in the second shell
• Start on the right side and go counter clock-wise

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QUESTIONS

• What is the Bohr model?
• Its used to explain the energy of atoms
• What are subatomic particles?
• Parts that make up an atom

HYDROGEN

How do we make a Bohr model? Determine # protons & neutrons- draw them In inner circle (continue on next slide)

Determine # electrons- place in energy levels as follows:1st level- 2e MAX, 2nd level- 8e MAX, 3rd level- 8e MAX, FOR EL. 2-18

VALENCE ELECTRONS

• Electrons in outer most shell
• Determines CHEMICAL PROPERTIES

Now you know how to draw a Bohr model.