Question

Y=2,6
z=2,8,2
23) which element belongs to the 2nd period?
24) which element belongs to the 24 group?
25) which element belongs to the 18 group?​

Answer 1

Explanation:

23. Y belong to 2nd period

24.24th group not exist

25. Z and Y don't belong to 18th group

Z belong to 2nd group

Y belong to 16th group