Electron Configuration with Ions and Exceptions

Which elements usually form cations?

• non-metals

• metals

• any elements

• noble gases

The element Ca will form a cation. What would be the noble gas that this cation would have the same electron configuration as ?

• Ne

• Ar

• He

• Xe

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When iodine forms an iodide ion, into which orbital would the electron be going?

• 5s

• 4s

• 5p

• 3d

• It wont gain an electron, it would lose one.

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Which electron configuration belongs to a Chloride (Cl^-) ion?

• 1s² 2s² 2p⁶ 3s² 3p⁵

• 1s² 2s² 2p⁶ 3s² 3p⁶

• 1s² 2s² 2p⁶ 3s² 3p⁷

• 1s² 2s² 2p⁶ 3p⁷

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What electron configuration matches an oxygen ion?

• 1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵
• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶4s²3d¹

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An aluminium ion would have which electron configuration?

• 1s² 2s² 2p⁶ 3s²

• 1s² 2s² 2p⁶ 3s² 3p¹

• 1s² 2s² 2p⁶ 3s² 3p⁶

• 1s² 2s² 2p⁶

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When Zinc becomes an ion, it loses its electrons from the ____ orbital.

• 1s

• 4s

• 3d

• 3p

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In which of the following groups are the three species isoelectronic?

• S^2¯, K⁺, Ca²⁺
  
• Sc, Ti, V²⁺
• O^2¯, S^2¯, Cl¯
• Mg²⁺, Ca²⁺, Sr²⁺

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Which of the following is the ground-state configuration of a negative ion of a halogen?

• 1s²2s²2p⁵3s²3p⁵
  
• 1s²2s²2p⁶3s²3p⁶
• 1s²2s²2p⁶2d¹⁰3s²3p⁶
• 1s²2s²2p⁶3s²3p⁶3d⁵

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What is the electron configuration of Ca⁺²?

• 1s2 2s2 2p6 3s2 3p6 4s2

• 1s2 2s2 2p6 3s2 3p6

• 1s2 2s2 2p6 3s2 3p6 4s4

• 1s2 2s2 2p6 3s2 3p6 4s2 4p2

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