Question

The valency of helium and calcium are
respectively.
a) 0 and 1
b) 1 and o
c) 1 and 2
d) 0 and 2​

Answer 1

Answer:

option d

0 and 2

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Answer 2

Answer:

The answer is D) 0 and 2

Explanation:

As helium follows the octet rule it has valency 0 and calciums atomic number is 20 with electronic configurations of 2 , 8 , 8 , 2

Thus the valence electrons of calcium are 2 thus valency is 2

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