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Question

In the atom of an element, seven electrons are present in the outermost shell. If it acquires an inert gas configuration by receiving more electrons, charge on the ion formed will be:​


A
7-
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B
1+
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C
7+
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D
1-
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Solution

The correct option is D 1-
In the given atom, there are seven electrons present in its valence shell. To attain an octet electronic configuration, it should gain one more electron. When an atom gains one or more electrons during a chemical reaction, it acquires one unit negative charge for each gained electron. Here, one electron is gained by the atom, so one negative charge is acquired by it.​

Chemistry

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