Question

An element X consists of 7 electrons in its valence shell (M shell). What is the
valency of the element X?

Answer 1

Answer:

Answer: It has 7 electrons in its M shell.. So it needs more 1 electron to complete its octate or to attain its octate state.. Therefore,the valency of the element is 1..

Answer 2

Answer:

Since the given element X has 7 electrons in its valance shell , the element X needs only one more electron to complete it's octet so the element must attain one electron .

 Therefore the valency of the element is :-

     8 - 7 = 1

Since the element is accepting one electron it's electronic configuration is negative.

$\red\bigstar$ Therefore , the valency of the element X is -1

Extra Bites

✩The element X is a non - metal (non metals are electron acceptors).

✩The element X is an element in Group-17 or halogens.

✩ The element X can be Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), Astatine (At) or Tennessine (Ts).