Question

Elements X,Yand Z have atomic numbers 9,10 and 19 respectively. Which one : a) forms anion; b) forms cation ; c) chemically inert​

Answer 1

Answer:

a) X

b) Z

c) Y

Explanation:

X has one deficient electron....hence non metal and forms anion

Y .... complete shell

Answer 2

a) X forms anion.

b) Z forms cation

c) Y is chemically inert

Explanation:

Atomic number of X is 9

E.C. is K L

2 7

It gains 1 e- to become stable.

So, it is a non metal and forms anion.

Atomic number of Y is 10

E.C. is K L

2 8

It is already stable.

So, it is a non metal and chemically inert.

Atomic number of Z is 19

E.C. is K L M N

2 8 8 1

It loses 1 e- to become stable.

So, it is a metal and forms cation.