Q. 145.0( 1 Vote )

An atom with 3 protons and 4 neutrons will have a valency of:
A. 3

B. 7

C. 1

D. 4

Answer :

An atom with 3 protons would have 2 electrons in its innermost shell and 1 proton in its outermost shell. The outermost proton could be easily given away by the atom to attain a stable two electron inner shell configuration. So, the valency would be 1.

Hence the correct option is C.

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