Question

How it can valency of an element be determine if its electron configruation is known,what wil be the valency of an element of atomic numner 9?

Answer 1

The number of electrons within the outer shell of the element determine its valency. To calculate the valency of an element, there are multiple methods. ... The valency of an atom is equal to the number of electrons in the outer shell if that number is four or less.

For eg. Z=9 :- 2,7 its valency is one

Z=11:- 2,8,1 its valency is 1

Answer 2

An element's valency is determined by the number of electrons in its outer shell. ... The valency of an element of atomic number 9 would be 1 since the number of valence electrons in its outermost shell is 7 so it needs only one electron to attain the noble gas configuration.