The first electron shell which is the nearest to the nucleus never holds more than 39 n 39 electrons...........

General Studies (CGL) General Science

The first electron shell which is the nearest to the nucleus never holds more than 'n' electrons, where 'n' is equal to:

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SSC CGL 6th March 2020 Shift-2

- The first electron shell, also known as the K shell, is the closest to the nucleus.

- It can hold a maximum of 2 electrons.

- This is determined by the formula \(2n^2\), where \(n\) is the principal quantum number. For the first shell, \(n = 1\).

- Option 4: 2 is correct.

- Option 1: 8 refers to the capacity of the second shell, not the first.

- Option 2: 4 is incorrect; no electron shell holds 4 electrons as a maximum.

- Option 3: 6 refers to the capacity of orbitals within subshells, not the shell itself.

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