The atomic number of Helium is 2, in which group & period does it belongs to? please use your number six to answer this simple question but 90% will fail
a. group 2 & period 2
b. group 1 & and period 2
c. group 0 and period 1
d. group 8 and period 2
e. group 1 and period 1
wish you the best
Ans C