Question

The maximum number of electrons that can be present in an SHELL is

a)
`2 {n}^(2)`
b)
`2 {n}^(2) + 1`
c) 2n
d) none of these.​

Answer 1

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The maximum number of electrons that can be present in an shell is

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a)
`2 {n}^(2)`

b)
`2 {n}^(2) + 1`

c) 2n

d) none of these.

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OPTION (a)

`2 {n}^(2)`

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In First shell only 2 electron can be placed .

`2 {n}^(2) \\ n = 1 \: (bez \: \: no \: \: shell \: = 1) \\ so \\ 2 { n}^(2) = 2 * {1}^(2) = 2 \: electrons`

In second shell 8 electrons can be placed

`2 {n}^(2) \\ n = 1(bez \: \: no\: \: shell \: = 2) \\ 2 {n}^(2) = 2 * {2}^(2) = 2 * 4 = 8 \: electrons`