Unit 2 Review

What are valence electrons?

• The total number of electrons in an atom

• The number of electrons in the outermost shell

• The number of electrons in the second shell

• The number of protons in the outermost shell

Which shows the subatomic particle correctly matched to its mass?

• Proton: 1/1000 amu

  Electron: 1 amu

  Neutron: 1/1000 amu

• Proton: 1 amu

  Electron: 1/1000 amu

  Neutron: 1 amu

• Proton: 1 amu

  Electron: 1/1000 amu

  Neutron: 1/1000 amu

what kind of charge (ions) do noble gasses form?

• positive

• negative

• neither

Which shows the families correctly matched with their amount of valence electrons?

• Alkali metals: 1

  Halogens: 2

  Noble gasses: 8

• Alkali metals: 2

  Halogens: 7

  Noble gasses: 8

• Alkali metals: 1

  Halogens: 7

  Noble gasses: 8

• Alkali metals: 1

  Halogens: 6

  Noble gasses: 8

which family tends to lose 1 electron?

• alkaline earth metals

• alkali metals

• transition metals

• noble gasses

which element has the highest ionization energy and electronegativity?

• Cs

• F

• Na

• Ne

which element has the largest atomic radius?

• Na

• F

• H

• Ne

what determines the amount of valence electrons (dots) an atom originally has?

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Which shows a correct Lewis dot diagram?

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Which two configurations match that of Barium (an alkaline earth metal)?

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s²

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4d¹⁰ 4p⁶ 5s² 5d¹⁰ 5p⁶ 6s²

• [Xe] 6s²

• [Rn] 6s²

• 1s² 2s² 2p⁶ 3s³ 3p⁵ 4s² 4d¹⁰ 4p⁶ 5s² 5d¹⁰ 5p⁶ 6s²