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The five successive energies of an eleme...

The five successive energies of an element are `800, 2427, 3658, 25024` and `32824 kJ mol^(-1)` respectively. The number of valence electron is

A

3

B

5

C

4

D

2

Text Solution

Verified by Experts

The correct Answer is:
D
Since `Delta_(i) H_(4)` is very high as compared to `Delta_(i) H_(3)` therefore force , there are three electrons in the valence shell .
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PRADEEP-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -Competition Focus (Jee Main and Advanced / Medical Entrance ) ( Multiple Choice Question I )
  1. which of the following configurations represents atoms of the elements...

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  2. Which electronic configuration of an element has abnormally high diffe...

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  3. The five successive energies of an element are 800, 2427, 3658, 25024 ...

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  4. For one of the element various successive ionization enthalpies ...

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  5. The following table shows the successive molar ionization energ...

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  6. One mole of magnesium in the vapor state absored 1200 kJ mol^(-1) of e...

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  7. Amongest Be, B, Mg and Al, the second ionization potential is maximum ...

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  8. The second ionization energies of Li, Be, B and C are in the order

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  9. Which of the following processes involves absorption of energy?

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  10. Electron affinity is positive when

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  11. How does the electron gain enthalpies vary across a period and ...

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  12. The first ionisation potential of Na is 5.1eV. The value of electrons ...

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  13. Which of the following represents the correct order of increasing elec...

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  14. The order of decreasing negative electron gain enthalpy of O. S...

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  15. the correct order of electron gain enthalpy with negative sign of F,Cl...

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  16. Which of the following atom should have the highest negative first ele...

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  17. The element with positive electron gain enthalpy is

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  18. Which of the following species has the highest electron affinit...

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  19. The highest electron affinity is shown by

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  20. The electronegativity of the following elements increases in the orde...

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