Chemical Bonding Review

Why are most single atoms unstable?

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Atoms will gain, lose, or share valence electrons to ________.

• achieve a full outer shell

• increase their mass

• change their color

• become radioactive

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Compounds form when two or more atoms ________ bond together.

• chemically

• physically

• loosely

• temporarily

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Each shell is an ________.

• orbital

• electron

• atom

• molecule

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Where do electrons want to stay?

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The closer atoms are to 8 (or 0) valence electrons, the more ______ they react.

• reactivity

• slowly

• rarely

• gently

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What happens to an atom when it gains electrons?

• It becomes a cation

• It becomes an anion

• It becomes neutral

• It loses protons

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What do elements in groups/families share?

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What is the group number of Helium (He)?

• 18

• 1

• 2

• 16

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For Group 1, how many valence electrons are there and what is the electron activity?

• A) 1 valence electron, Lose 1

• B) 2 valence electrons, Lose 2

• C) 3 valence electrons, Gain 3

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