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Atomic Models

Atomic Models. Bohr Model Cloud Model. Bohr Model. Electrons orbit the nucleus in definite orbits. The orbits can hold only a specific number of electrons. Once a level is full, the electrons start filling the next level. Electron Level Limits:. 1st Level = 2 electrons

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Atomic Models

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  1. Atomic Models Bohr Model Cloud Model

  2. Bohr Model • Electrons orbit the nucleus in definite orbits. • The orbits can hold only a specific number of electrons. • Once a level is full, the electrons start filling the next level.

  3. Electron Level Limits: • 1st Level = 2 electrons • 2nd Level = 8 electrons • 3rd Level = 8 electrons

  4. Hydrogen: + -

  5. Helium:

  6. Lithium:

  7. Beryllium

  8. Cloud Model: • The electrons are in an area around the nucleus called an electron cloud. • There are enough electrons to make the atom’s charge neutral

  9. Hydrogen: 1P 0N 1E

  10. Helium: 2P 2N 2E

  11. Lithium 3P 3N 3E

  12. Assignment: • Draw a Bohr Model and a Cloud Model for the first 18 Atoms on the Periodic Chart. • Include the Atomic Number and Mass. • You may write rather than draw the number of protons and neutrons there are in the nucleus, but draw all electrons for the bohr model.

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