Question

The atomic number of three elements A, B and C are 9, 10 and 13 respectively. Which of them will form a cation?

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Answer

Electronic configuration of A : 2,7

Electronic configuration of B : 2,8

Electronic configuration of C: 2, 8, 3

C” will form a cation because a cation is formed by the loss of one or more electrons by an atom.

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