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The outermost electronic configuration o...

The outermost electronic configuration of the most electronegative element is

A

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

B

`ns^(2)np^(4)`

C

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

D

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

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The correct Answer is:
C
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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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MTG IIT JEE FOUNDATION-ATOMIC STRUCTURE -Exercise (Multiple Choice Question)
  1. According to the uncertainty principle,

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  2. When the azimuthal quantum number l = 1, the shape of the orbital will...

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

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  4. No two electrons in an atom of an element have

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  5. the orbital diagram in which aufbau principal is violated is :

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  6. If uncertainty in possition of electron is zero, then the uncertainty...

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  7. de-Broglie equation tells about

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  8. When an electron jumps from L to K shell -

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  9. Which of the following orbitals does not exist ?

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  10. Which of the following is not possible ?

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  11. For 4s-orbital, m has the value

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  12. Presence of three unpaired electrons in phosphorus atom can be explain...

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  13. The maximum number of electrons in a subshell is given by the expressi...

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  14. Which of the following relates to photon both as wave motion and as a...

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  15. The number of nodes in 5d orbital is

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  16. For which of the following species, Bohr theory is not applicable ?

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  17. If quantum number for last electron is n=3,l=0,m=0, then atomic number...

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  18. Which of the following transitions have minimum wavelength

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  19. Planck's constant has the dimension (unit) of

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  20. When the frequency of light incident an a metallic plate is doubled , ...

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