Question

2)The valency of element with electronic configuration........ is 2.
(2,5)
(2,4)
(2,6)
(2,7)
Row 1​

Answer 1

valency of element with electronic configuration

(2,6) is 2.

• Electronic configuration of 2,5 states presence of 5 electrons in valence shell. Thus, it requires three more to complete the octet and hence will have valency three.

• Electronic configuration of 2,4 states presence of 4 electrons in valence shell. Thus, it requires four more to complete the octet and hence will have valency four.

• Electronic configuration of 2,6 states presence of 6 electrons in valence shell. Thus, it requires 2 more to complete the octet and hence will have valency 2.

• Electronic configuration of 2,7 states presence of 7 electrons in valence shell. Thus, it requires one more to complete the octet and hence will have valency one.

Answer 2

Answer:

(2,6) is 2

Explanation:

• Electronic configuration of (2,6) states presence of 6 electrons in valence shell. Thus it requires 2 more to complete the octet and hence will have valency 2.