Periodic Trends Exam

Which element has a larger atomic radius than sulfur?

• chlorine

• cadmium

• fluorine

• oxygen

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When electrons are added to the outermost shell of a carbon atom, it forms

• an anion that has a larger radius.

• an anion that has a smaller radius.

• a cation that has a larger radius.

• a cation that has a smaller radius.

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Which element has the smallest atomic radius?

• calcium

• potassium

• scandium

• titanium

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How does a lithium cation compare to a lithium atom?

• The cation is larger.

• The cation has the same radius.

• The cation is smaller.

• The cation has the same charge.

Which ion was formed by providing the second ionization energy to remove an electron?

• Ca2

• N3–

• Fe3+

• S2–

Among the elements of the main group, the first ionization energy increases

• from left to right across a period.

• from right to left across a period.

• when the atomic radius increases.

• down a group.

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Which correctly summarizes the trend in electron affinity?

• It tends to be very high for group 2.

• It tends to be more negative across a period.

• It tends to remain the same across periods.

• It tends to be more negative down a group.

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Which element would release the most energy while adding an electron to a neutral atom in the gas phase?

• Na

• Al

• Br

• S

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Electronegativities of the elements Na, Al, P, and Cl follow a specific trend across the period. Based on this trend, an electron will be most strongly attracted to

• Na.

• Al.

• P.

• Cl.

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Which element would most likely have an electron affinity measuring closest to zero?

• Na

• Al

• Rb

• Ar

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