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The outermost electronic configuration o...

The outermost electronic configuration of the least reactive element is

A

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

B

`3S^(2)3P^(6)`

C

`2s^(2)2p^(4)`

D

`6s^(2)6p^(6)7s^(1)`

Text Solution

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The correct Answer is:
D
Fr is more electropositive element.
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NARAYNA-CLASSIFICATION OF ELEMENTS AND PERIODICITY -EXERCISE - 1 (C.W)
  1. (a) How do the properties of eka-aluminium element predicted by Mendel...

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

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  3. Which one of the following is correct order of the size of iodine spec...

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  4. The atomic radii in case of inert gases is

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  5. Which of the following sequence of elements is arranged in the order o...

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  6. Which of the following sets contain only isoelectronic species?

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  7. The ionic species having largest size is

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  8. The first ionisation potential of Na,Mg,Al and Si are in the order

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  9. Arrange S, P and As in order of increasing ionisation energy.

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  10. The element with the highest first ionization potential is:

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

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  12. The second electron gain enthalpies (in kJ mol^(-1)) of oxygen and sul...

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  13. The electronic configurations of four elements are given below. Arrang...

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

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

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  16. The order of electron gain enthalpy (magnitude) of O, S and Se is:

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  17. The outermost electronic configuration of the least reactive element i...

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  18. Which one of the following is incorrect ?

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  19. Pauling 's electronegativity scale is based upon experimental values o...

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  20. Increasing order of electronegativity is

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