A species 'X' contains 9 protons, 10 electrons and 11 neutrons. It is

A neutral atom

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An isotope

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A cation

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An anion

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Solution

The correct option is D
An anion

Since there are 9 protons in X, its atomic number is 9.

Its electronic configuration would be 2,7; this indicates that X would readily gain an electron to complete its octet.

As given X has 10 electrons that means it has gained an electron and its electron configuration is 2,8.

Hence X is an ion that has gained an electron that is X is an anion.

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