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Identify the least stable ion amongst th...

Identify the least stable ion amongst the following:

A

`Li^(-)`

B

`Be^(-)`

C

`B^(-)`

D

`C^(-)`

Text Solution

Verified by Experts

The correct Answer is:
B
Be already has fully filled 2s- subshell `(2 s^(2))` and therefore shows tittle tendency to accept an extra electron to form `Be^(-)`.
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PRADEEP-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -Competition Focus (Jee Main and Advanced / Medical Entrance ) ( Multiple Choice Question I )
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  2. Which of the following has the largest size?

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  3. Identify the least stable ion amongst the following:

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  4. Which of the following transitions involves maximum amount of energy?

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  5. If the IP of Na is 5.48 eV, the ionsation potential of K will be

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  6. The first ionisation potential of Na ,Mg and Si are respectively 496,7...

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  7. The first ionisation potentials (eV) of Be and B respectively are

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  8. In the following, the element with the highest ionization energy is

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  9. Which electronic configuration will show the highest first ionization ...

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  10. The increasing order of the first ionization enthalpy of the elements ...

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  11. With which of the following electronic configuration of an atom has th...

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  12. The correct order of ionisation energy of C, N, O and F is

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  13. Which of the following orders about ionization energy is correct...

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  14. Among the following, the third ionisation energy is highest for

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  15. Which of the element is expected to have lowest first ionisation entha...

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  16. Which of the following atoms has the highest first ionisation energy ?

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  17. Generally, the first ionisation energy increases along a period. But t...

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  18. The correct decreasing order of first ionisation enthalpies of five el...

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  19. Which of the following represents the correct order of increasing firs...

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  20. Screening effect is not observed in :

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