Which of the following elements is the most chemically rective?

• He (Helium)

• Ne (Neon)

• Li (Lithium)

• Ar (Argon)

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An octet is equal to

• 2

• 4

• 5

• 8

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How many valence electrons does potassium (K) have?

• 0

• 1

• 9

• 19

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Which of the following situations will cause fluorine (F) to have an octet configuration?

• loss of one electron

• gaining one electron

• loss of two electrons

• gaining three electrons

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Which of the following situations will cause magnesium (Mg) to have an octet configuration?

• loss of one electron

• gaining one electron

• loss of two electrons

• gaining three electrons

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The elements of Group ____ are able to satisfy the octet rule without forming compounds.

• 1

• 2

• 17

• 18

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An ion and its parent atom differ in

• electron configuration.

• number of electrons.

• chemical reactivity.

• all of these choices.

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The charge on an ion is

• always positive.

• always negative.

• either positive or negative.

• zero.

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An ion that does NOT have a similar electron configuration to that of neon is

• Cl^-

• Mg²⁺

• Na⁺

• O^2-

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The pair of ions listed below with similar chemical properties is

• F^- and Cl^-

• F^- and Li⁺

• Na⁺ and Cl^-

• Na⁺ and F^-

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