Question

Match the following with correct response. (1)
Column A
Column B
(1) Valency
(A) Valency remains same
(2) In groups
(B) Metals
(3) In Period
(C) Atomic size decreases
(D) Combining capacity
(4) Elements on the left hand side​

Answer 1

please write the question in a preodic order or in a nice manner so that it can be done in a better way. I can't understand this.