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If element with particle quantum number ...

If element with particle quantum number `ngt4` were not allowed in nature , the number of posible elemant would be

A

`60 `

B

`32`

C

`4`

D

`64`

Text Solution

Verified by Experts

The correct Answer is:
A
(a) KEY CONCEPT : The maximum number of electrons in an orbit is `2 n^(2) , ngt 4 ` is not alllowed.
therefore the number of maximum electron that can be in first four orbit are
`2 (1)^(2) + 2 (3)^(2) + 2 (4)^(2) `
`= 2 + 8 + 18 + 32 = 60 `
Therefore , possible element are `60` .
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