Question

Which is related to the number of electrons in the outer main energy level of the elements from the alkali metals to the halogens?

I. Group Number
II. Period Number

A. I only
B. II only
C. Both I and II
D. Neither I nor II

Answer 1

I would say group number

Answer 2

It's just the no. of electrons. SO it is only group number

Answer 3

I agree with Rushwr :)

Answer 4

Group number i believe is correct.