Unit 2 Chemistry Review

Select the word that matches this definition: “The likeliness of an element to gain an electron.”

• valence

• family

• atomic radius

• electronegativity

Why does atomic radius increase or decrease as we move across a period?

• It increases because there are more protons in the nucleus.

• It increases because there are more electrons in the electron rings.

• It decreases because the positive force of additional protons pulls more on the electrons.

• It decreases because the negative force of additional electrons push each other inwards.

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Do the words “family” and “group” describe a row (↔) or a column (↕) on the Periodic Table?

• Row (↔)

• Column (↕)

• Neither

• Both

What happens to the electronegativity within a row (left to right →) in the Periodic Table?

• It increases.

• It decreases.

• It stays the same.

• It fluctuates.

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In general, do metals gain or lose electrons when reacting?

• Gain electrons

• Lose electrons

• Neither gain nor lose electrons

• Share electrons

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In general, do nonmetals gain or lose electrons when reacting?

• Gain electrons

• Lose electrons

• Neither gain nor lose electrons

• Share electrons

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What is the most common valence number of the nonreactive elements?

• 8

• 3 or 4

• 2 or 6

• 1 or 7

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Reflecting on your previous response, is Lithium (Li) or Francium (Fr) a more reactive element?

• Lithium (Li)

• Francium (Fr)

• Both are equally reactive

• Neither is reactive

Use Lithium’s (Li) atomic structure to explain why it is bigger or smaller than Francium (Fr).

• Lithium is bigger due to more electron shells

• Francium is bigger due to more electron shells

• Lithium is smaller due to fewer electron shells

• Francium is smaller due to fewer electron shells

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What characteristic do Sodium (Na) and Calcium (Ca) have in common?

• Both are nonmetals

• Both are metals

• Both are gases

• Both are liquids

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