Question

Elements P Q R and S have atomic numbers 11 15 17 and 18 respectively. which of them are reactive non-metals?
(1) P and Q
(2) P and R
(3) Q and R
(4) R and S​

Answer 1

HEY MATE HERE IS UR ANSWER.

3. ELEMENTS Q AND R ARE NON METALS AS THEY HAVE -VE VALENCY..

THANKS ..

PLZ MARK AS BRAINLIEST

Answer 2

Answer:

1) P and Q

Because this element is more reactive because P and Q element outer most orbit is not satisfied