What is the number of valence electrons in Group 17 elements in the Periodic Table?

Question

What is the number of valence electrons in Group 17 elements in the Periodic Table?
a.) 7
b.) 8
c.) 17
d.) equal to the period number

Answer 1

Well c. doesn't make sense because there can only be a maximum of 8 in the valence shell (unless you are dealing with a transition group which this is not)

d. Number of valence electrons is dependent on group number, not period number so this doesn't make sense.

b. I believe group 18 (He, Ne, Kr, Xe, etc.) has 8 valence electrons, so I don't think this is right.

I would choose a. if Group 17 contains F and Cl.

Answer 2

The number of valence electrons is the group number so the answer is 7.