A species of an element X has a net charge of -1 and the species has 18 electrons and 20 neutrons. Then the correct statement is:

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Atomic number of X is 18.

Mass number of X is 38.

Number of protons in X is 17.

Number of protons in X is 18

answer is C.

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Detailed Solution

1737X−1Number of Neutrons = 37 - 17 = 20Number of Protons = 17Number of electrons = 17 + 1 = 18

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