객관식
Which of the following sets of ions forms an isoelectronic series?
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2. Atoms & Elements
Ions
객관식
How does a chlorine atom become a negatively charged ion?
A
By gaining one electron
B
By losing one electron
C
By losing one neutron
D
By gaining one proton
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검증된 단계별 안내1
Understand that an atom becomes an ion by gaining or losing electrons, which changes its net electric charge.
Recall that chlorine (Cl) is a halogen with 7 valence electrons and tends to achieve a full octet by gaining electrons.
Recognize that gaining one electron will give chlorine a total of 8 valence electrons, making it more stable and negatively charged.
Note that losing electrons would make the atom positively charged, which is not typical for chlorine in forming ions.
Conclude that a chlorine atom becomes a negatively charged ion (Cl⁻) by gaining one electron.
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