Question

ASSERTION: Electrovalency of Na+ is 1 .REASON: The number of electrons which an atom loses or gains in the formation of ionic compounds is known as its valency. *
Both A and R are true, and R is correct explanation of the assertion.
Both A and R are true, but R is not the correct explanation of the assertion.
A is true, but R is false.
A is false, but R is true.​

Answer 1

Answer: Both A and R are true, and R is correct explanation of the assertion.

Explanation:- this is beacuse Na has 11 Electrons , thus it has to lose or donate one electron to attain stable electronic configuration.

Answer 2

The number of electrons in an atom's outermost shell determines its valency.

To get the nearest noble gas configuration of Ne, the sodium atom loses its 3s electron.

Because sodium only has one electron in its outermost shell that participates in bonding, its valency is +1.

Both A and R are true, and R is correct explanation of the assertion.