Chemistry: Matter and Change

Section 1: Forming Ions

Self Check Quizzes

1
Which of these is the electron configuration of an atom most likely to lose an electron?

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A)1s2 2s2 2p6
B)[He]2s2 2p5
C)1s2 2s2 2p6 3s2 3p5
D)1s2 2s2 2p6 3s2 3p6 4s1
2
A positive ion forms when ___________.
A)an atom loses one or more valence electrons
B)an atom gains one or more valence electrons
C)electrons are pulled into the nucleus
D)electrons are pushed out of the nucleus
3
Why is the calcium ion (Ca2+) more stable than the calcium atom (Ca)?
A)Twenty electrons are more stable than eighteen electrons.
B)Eighteen electrons are less stable than twenty electrons.
C)The two electrons more than the noble gas configuration is more stable.
D)The noble gas configuration is more stable.
4
What is the electron configuration of the sodium atom after it loses an electron?

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A)1s2 2s2 2p6
B)[He]2s2 2p5
C)1s2 2s2 2p6 3s1
D)1s2 2s2 2p6 3s2
5
Explain why the zinc 2+ ion has some stability.

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A)The zinc ion has achieved a noble gas configuration.
B)The zinc ion has full s, p, and d sublevels to form a pseudo-noble gas configuration.
C)The zinc ion is a transition metal.
D)The zinc ion has bonded with two free electrons.
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