AnswersCR03101 ChemistryUnit Test

Unit Test — Unit test Answers

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The elements of which group are nonreactive?

A
halogens
B
alkaline earth metals
C
noble gases
D
alkali metals
22
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When electrons are removed from the outermost shell of a calcium atom, the atom becomes

A
an anion that has a larger radius than the atom.
B
an anion that has a smaller radius than the atom.
C
a cation that has a larger radius than the atom.
D
a cation that has a smaller radius than the atom.
23

Among the elements of the main group, the general trend in the first ionization energy moving across a period is not followed between group 2 and group 13. Which best explains these exceptions?

A
The ionization energy decreases because the full s orbital shields the electron entering the p orbital.
B
The ionization energy increases because the full s orbital shields the electron entering the p orbital.
C
The ionization energy decreases because the stability of the half-full p subshell is increased.
D
The ionization energy increases because the stability of the half-full p subshell is increased.
24

The most negative electron affinity is most likely associated with which type of atoms?

A
large nonmetal atoms
B
small nonmetal atoms
C
large metal atoms
D
small metal atoms
25

Which property would cesium most likely have?

A
It is hard.
B
It is ductile.
C
It is a gas.
D
It has low reactivity.

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