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

Answer: (c) 1

The combining capacity of an atom is known as its valency. The number of bonds that an atom can form as part of a compound is expressed by the valency of the element.

For the atom

Neutron(n) = 4

Proton (p) = 3

Hence Electron(e) = 3

Distribution of electrons = 1s2 2s1

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