Where would you find the element with least mass?

Will give 20 point's and Brainliest if answer is certified and correct.



A. period 1, group 18

B. period 7, group 1

C. period 1, group 1

D. period 3, group 2

Where would you find the element with least mass Will give 20 points and Brainliest if answer is certified and correct A period 1 group 18 B period 7 group 1 C class=