Q. The third shell of an atom can have a maximum of ______ electrons.
Explanation by: Praveen Singh
The maximum number of electrons that can occupy a shell is given by the formula 2n², where n is the principal quantum number (the shell number). For the third shell (n = 3): 2×(3)^2=2×9=18 So, the third shell can hold a maximum of 18 electrons.
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