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The outermost electronic configuration o...

The outermost electronic configuration of the most electronegative element is

A

`ns^(2) np^(3)`

B

`ns^(2) np^(6)`

C

`ns^(2)`

D

`ns^(2) np^(5)`

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The correct Answer is:
D
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The properties of the elements (atomic/ionic radii, electron gain enthalpy, ionization enthalpy, electronegativity, valence, oxidising/reducing power, acid/base character, etc.) which are directly or indirectly related to their electronic configirations are called periodic properties. These properties show a regular gradation on moving from left to right in a period or form top to bottom in a group. Down a group, the atomic/ionic radii, metallic character and reducing character increase while ionization enthalpy and electronegativity decrease. Along a period from left to right, atomic/ionic and metallic character decrease while ionization enthaloy, electronegativity, non-metallic character and oxiding power increase. However, electron gain enthalpy becomes less negative down a group butmore negative along a period. In contrast, inert gases have positive electron gain enthalpies which do not show may regular trend. The outermost electronic configuration of the most electronegative elements is:

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MOTION-PERIODIC TABLE -Exercise - 1
  1. The maximum tendency to form unipositive ion is for the elment with th...

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  2. The second ionisation potentials in electron volts of oxygen and fluor...

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  3. A sudden large jump between the values of second and third ionisation ...

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  4. The correct order of stability of Al^(+) , Al^(+2) , Al^(+3) is :

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  5. The ionization energy of sodium is 495 kJ mol^(-1). How much energy is...

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  6. Ionisation energy increases in the order :

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  7. Mg forms Mg(II) because of :

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  8. IE(1) and IE(2) of Mg are 178 and 348 kcal mol^(-1). The energy requir...

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  9. Highest ionisation potential in a period is shown by

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  10. In which case the energy released is minimum -

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  11. In the formation of a chloride ion, from an isolated gaseous chlorine ...

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  12. The correct order of electron affinity is:

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  13. The screening effect of d-electron is

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  14. The X-X bond length is 1.00A^(0) and C-C bond length is 1.54A^(@). If ...

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  15. Electronegativity scale of pauling is based upon -

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  16. The correct set of decreasing order of electronegativity is

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  17. Which of the following is affected by stable configuration of an atom ...

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  18. Correct order of electronegativity of N,P,C and Si on Pauling scale is...

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  19. Polarity of a bond can be explained by :–

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  20. The outermost electronic configuration of the most electronegative ele...

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