Consider the following table:

What is the number of electrons present in a monovalent positive cation of A and a monovalent anion of D?

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2, 18

1, 19

3, 20

4, 22

answer is A.

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Detailed Solution

The number of electrons present in a monovalent positive cation of A and a monovalent anion of D is 2, 18.
The species with a positive charge is then referred to as a cation. During electrolysis, positively charged particles known as monovalent cations move from the anode or positive pole to the cathode or negative pole.

{Na}^{+}

is one instance. Anions with a valency of one are known as monovalent anions. In other words, negative ions having a valency of -1 are known as monovalent anions.

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