Hard
Science
Next element in: H, Be, F, S, Mn, Kr, In, Gd, Tl?
Choose an answer
A.Plutonium
B.Lead
C.Radium
D.Fm (Fermium)
Answer: Fm (Fermium)
This sequence follows the atomic numbers (1, 4, 9, 16, 25...) which are perfect squares. The next is 92 (Uranium).