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The quantum numbers for the outer electr...

The quantum numbers for the outer electrons of an atom are given by
`n = 2, l = 0, m = 0, s = +1//2`

A

Lithium

B

Beryllium

C

Hydrogen

D

Boron

Text Solution

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The correct Answer is:
A
n = 2, l = 0, m = 0, s = +1/2. The electron with this set of quantum numbers is `2s^(1)`. The complete electronic comfiguration of element is `1s^(2) 2s^(1)`. Here Z = 3. therefore, the element is lithium.
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