Question

which of 2 is more reactive "X" of atomic no 18 or "Y" of atomic no 16and why?​

Answer 1

Y is more reactive because it has incomplete octet and it needs 2 electrons to complete its octet whereas in X it has complete octet . which means its a inert gas and inert gases are stable and are unreactive.


hope it helps you

Answer 2

Atomic number 16 : oxygen
16--> 2 8 6
Atomic number 18: argon
18--> 2 8 8

As you can see argon has achieved octet structure so it has stable electronic configuration
So its less reactive


Thus
Answer is Y
.
.


HOPE IT HELPED
PLEASE MARK AS BRAINLIEST
THANK YOU