Question

An element X( atomic no.17) reacts with an element Y ( atomic no.20) : what is the positiin of X and Y in the periodic table?

Answer 1

Answer:

17-CHLORINE

20-CALCIUM

Explanation:

CHLORINE IN 7TH GROUP

CALCIUM IS IN 2ND GROUP

Answer 2

Answer:

chlorine (17) and calcium (20)

Explanation:

calcium is the this element in the 2nd column in periodic table .it is classified as alkaline earth metal

and chlorine is the 17th element in periodic table period 3 and group 17