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8.5AB Review

8.5AB Review. Where are protons found?. In the nucleus. Where are electrons found?. In the electron cloud. What is the mass of a proton?. One AMU. What is the mass of the neutron?. One AMU. If an atom has 12 protons, how many electrons would it need to be neutral ?. 12 electrons.

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8.5AB Review

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  1. 8.5AB Review

  2. Where are protons found? • In the nucleus

  3. Where are electrons found? • In the electron cloud

  4. What is the mass of a proton? • One AMU

  5. What is the mass of the neutron? • One AMU

  6. If an atom has 12 protons, how many electrons would it need to be neutral? • 12 electrons

  7. If an atom had 1 valence electron, how reactive would it be? • REALLY SUPER DUPER EXTREMELY REACTIVE!

  8. If an atom had 8 valence electrons, how reactive would it be? • Not reactive at all

  9. If an atom had 3 protons and 4 electrons, what would its overall charge be? • - 1…think… • +++ • - - - -

  10. If an atom had 5 protons and 2 electrons, what would its overall charge be? • + 3 • +++++ • - -

  11. Would this atom be more likely to lose or steal electrons? LOSE

  12. Would this atom be more likely to lose or steal electrons? Steal

  13. What makes up the mass of the nucleus? • Protons and Neutrons

  14. What are valence electrons? • Electrons in the outer most ring

  15. How many electrons can each ring hold? • 1st -2 • 2nd – 8 • 3rd - 8

  16. How many valence electrons does it take to be stable? • 8 (octet rule)

  17. How reactive is an element with 7 valence electrons? • REALLY SUPER DUPER EXTREMELY!!!!

  18. If an atom is unstable, what will it do to become stable? • It will gain or lose electrons

  19. What is the mass of 1 electron? • 1/2000 amu

  20. If an atom has 20 protons and 18 electrons, what is its charge? And how reactive is it? • +2 charge • Very reactive

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