SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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gain
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lose
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Either A or B
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None of the above
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Detailed explanation-1: -A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell.
Detailed explanation-2: -Non-metals tend to gain electrons and form negatively charged ions called anions. For example, sodium metal, Na, [Ne]3s1, loses one electron to form the Na+ ion which is isoelectronic with neon. (All the alkali metals have one valence electron and form 1+ cations.)
Detailed explanation-3: -Because the number of electrons does not equal the number of protons, each ion has a net charge. Cations are positive ions that are formed by losing electrons. Negative ions are formed by gaining electrons and are called anions.