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If overline(X) ion has 10 neutrons and 9...

If `overline(X)` ion has 10 neutrons and 9 protons , then the electronic configuration of the atom of the element x is

A

1 , 8 , 1

B

2 , 1

C

2 , 8

D

2 , 8 , 8

Text Solution

Verified by Experts

The correct Answer is:
2
`X^(-)` possess 9 protons (Z) , 10 neutrons and 10 electrons
`Xoverset(+l e^(-1))toX^(-1)`
(9 electrons) " " (10 electrons)
Therefore , the electronic configuration of an atom is 2 , 7
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