group 1 (1A) group 3 (3B) group 16 (6A) group 18 (8A)
Which group on the periodic table contains elements that are the least reactive?

Options:
- group 1 (1A)
- group 3 (3B)
- group 16 (6A)
- group 18 (8A)

group 18 (8A)