What is the maximum number of electrons that can occupy the first shell of an atom?

Correct option is A

The correct answer is (a) 2.
Explanation: The maximum number of electrons that can occupy any atomic shell is determined by the formula "2n²," where n represents the shell number (or principal quantum number). For the first shell (n=1), we substitute 1 into the formula:
· 2 × (1)² = 2
Thus, the first shell can hold a maximum of 2 electrons. This shell is also called the K-shell.
Information Booster:
● Electron Capacity Formula: The formula "2n²" determines the electron capacity for each shell. ● K-Shell (First Shell): Holds a maximum of 2 electrons. ● L-Shell (Second Shell): Holds up to 8 electrons. ● Electron Configuration: Electrons fill from lower to higher energy levels, starting with the K-shell. ● Stability: A full K-shell (2 electrons) is associated with increased stability, seen in noble gases like helium.