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The effective nuclear charge of an eleme...

The effective nuclear charge of an element with three valence electrons is 2.60. What is the minimum atomic number of the element?

A

1

B

2

C

3

D

4

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Refer to Ans to Q .15 page `3//95`
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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. Screening effect is not observed in :

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  2. In which case, effective nuclear charge is minimum ?

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  3. The effective nuclear charge of an element with three valence electron...

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  4. which of the following configurations represents atoms of the elements...

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

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

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

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

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

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

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

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

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  13. Electron affinity is positive when

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

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

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

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

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

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

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  20. The element with positive electron gain enthalpy is

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