Question

15. For an element, Z = 9. The valency of this element will be:
a. 4
b. 2
C. 1
d. 3​

Answer 1

Answer:

Option c. 1

hope it helps u.....

Answer 2

Element with atomic number(Z) = 9 is Flourine(F).

And it's the electronic configuration is

$1 {s}^{2} 2 {s}^{2} 2 {p}^{5}$

So ,valence = 1

Because there is a chance to get 1 electron. So the option is (C) 1

Hope it helps you✌✌