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Which which of the following electronic ...

Which which of the following electronic configuration an atom has the lowest ionisation enthalpy?

A

`1s^(2)2s^(2)2p^(6)`

B

`1s^(2)2s^(2)2p^(5)`

C

`1s^(2)2s^(2)2p^(3)`

D

`1s^(2)2s^(2)2p^(6)3s^(1)`

Text Solution

Verified by Experts

The correct Answer is:
D
`1s^(2)2s^(2)2p^(5)3s^(1)` represents the excited state of neon atom.The energy required to remove an electron from the excited state of neon must be least.
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MODERN PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-MULTIPLE CHOICE QUESTIONS (LEVEL -II)
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  2. The electronic configuration of the element which is just above the el...

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  7. In the isoelectric species the ionic radii (Å) of N^(3-) O^(2-) and F^...

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  15. Which which of the following electronic configuration an atom has the ...

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  17. The correct order of ionisation enthalpy of C, N, O, F is

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  18. Consider the isoelectric species Na^(+), Mg^(2+), F^(-) and O^(2-). T...

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  19. The first ionisation enthalpies of Na, Mg, Al and Si are in the order:

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  20. The last element of the P - block in 6^(th) period is represented by ...

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