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  • An atom with 3 protons and 4 neutrons will have a valency of (a) 3 (b) 7 (c) 1 (d) 4

An atom with 3 protons and 4 neutrons will have a valency of
(a) 3
(b) 7
(c) 1
(d) 4

Answers (1)

Answer: C

Electronic configuration of this element will be 2, 1 (Atomic number Z=3) Since number of electrons in the outermost shell is 1, hence the valency of the atom will be 1.

Given that, number of protons in an atom = 3 and number of neutrons = 4
Electronic configuration of _{3}Li=2,1

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infoexpert23

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