On moving from left to right in a short period, the valency of elements with respect to hydrogen:
A. increases
B. decreases
C. remains unchanged
D. first increases from 1 to 4 then decreases from 4 to 1.
Answer:D
On moving from left to right in a short period, the valency of elements with respect to hydrogen:
A. increases B. decreases C. remains unchanged D. first increases from 1 to 4 then decreases from 4 to 1.