How many electrons can occupy an atom's 2nd energy level (shell)?

eight

Explanation:

Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on.

h

i think its 100.

hope this !