Science Series Puzzle

Science Series Puzzle Solution - 27 January

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

What's the next in the series?

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Solution
Fm.

These are the chemical elements whose atomic numbers are perfect squares.

1, 4, 9, 16, 25, 36, 49, 64, 81, 100.