Question

a) what is atomic number of element X

b) what is mass number of element X

c) what is the number of valency electrons of X

d) what is the valency of X

e) write the total no of electrons in element X​

Answer 1

Explanation:

its helful for you

Mark me as

brainlist

please i request you

Answer 2

Answer:

X=florine

a) 9

b) 18

c) 9

d) 1

e) 9

Explanation:

I hope it help you

mark as brainlist and follow