Question

question 12
5 pts
which of these elements is a group 7 member?
calcium
chlorine
helium
boron

Explanation:

In the periodic table, chlorine is in group 17 (also known as group 7 in the old - style numbering for main - group elements). Calcium is in group 2, helium is in group 18, and boron is in group 13.

Answer:

B. Chlorine