Question

an atom has 4 protons and 5 neutrons . what is its valency.

Answer 1

If the atom has 4 protons it's atomic number will also be 4 .

so it's valency should be 2

Answer 2

atomic no. must be 4 because of presence of 4 protons......

valency must be 2 because of presence of 2 valence electrons....

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