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The main energy shell in which the elect...

The main energy shell in which the electron is present is given by

A

Principal quantum number

B

Azimuthal quantum number

C

Spin quantum number

D

Magnetic quantum number

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Nuclear charge actually experienced by an electron is termed as effective nuclear charge. The effective nuclear charge Z^(**) actuall ydepends on type of shell and orbital in which electron is actually present. The relative extent to which the various orbitals penetrate the electron clouds of other orbitals is s gt p gt d gt f (for the same value of n) The phenomenon in which penultimate shell electrons act as screen or sheild in between nucleus and valence shell electrons and thereby reducing nuclear charge is known as shielding effect. the penultimate shell electrons repel the valence shell electron to keep them loosely held with nucleus. it is thus evident that more is the shielding effect, lesser is the effective nuclear charge and lesser is the ionization energy. Q. Which of the following valence electron experience maximum effective nuclear charge?

Nuclear charge actually experienced by an electron is termed as effective nuclear charge. The effective nuclear charge Z^(**) actuall ydepends on type of shell and orbital in which electron is actually present. The relative extent to which the various orbitals penetrate the electron clouds of other orbitals is s gt p gt d gt f (for the same value of n) The phenomenon in which penultimate shell electrons act as screen or sheild in between nucleus and valence shell electrons and thereby reducing nuclear charge is known as shielding effect. the penultimate shell electrons repel the valence shell electron to keep them loosely held with nucleus. it is thus evident that more is the shielding effect, lesser is the effective nuclear charge and lesser is the ionization energy. Q. Which of the following valence electron experience maximum effective nuclear charge?

Nuclear charge actually experienced by an electron is termed as effective nuclear charge. The effective nuclear charge Z^(**) actuall ydepends on type of shell and orbital in which electron is actually present. The relative extent to which the various orbitals penetrate the electron clouds of other orbitals is s gt p gt d gt f (for the same value of n) The phenomenon in which penultimate shell electrons act as screen or sheild in between nucleus and valence shell electrons and thereby reducing nuclear charge is known as shielding effect. the penultimate shell electrons repel the valence shell electron to keep them loosely held with nucleus. it is thus evident that more is the shielding effect, lesser is the effective nuclear charge and lesser is the ionization energy. Q. Which of the following is not concerned to effective nuclear charge?

AAKASH INSTITUTE ENGLISH-STRUCTURE OF ATOM -ASSIGNMENT ( SECTION -A) Objective Type Questions (One option is correct)
  1. The formula for Heisenberg's uncertainty principle is

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  2. Who first time ruled out the existence of definite paths of electrons ...

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  3. Probability density is given by

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  4. The possible values of magnetic quantum number for p-orbital are

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  5. The notation of orbital with n=5 and l=3 is

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  6. The possible values of m(l) in a given subshell are given by the formu...

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  7. The shape of p orbital is

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  8. In multi-electron atom 4s-orbital is lower in energy than

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  9. The main energy shell in which the electron is present is given by

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  10. Shape of an orbital is given by

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  11. Orientation of orbitals is given by

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  12. Which one of the following orbitals is spherical in shape ?

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  13. The number of valence electrons in Aluminium is

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  14. For n=4 , which one of the following values of l is not possible ?

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  15. The number of electrons present in 3d of Cu^(o+) is

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  16. The maximum number of electrons that can be accomoddated in d(x^(2)-y^...

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  17. The number of unpaired electrons in magnesium atom is

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  18. The correct sequence of energy of orbitals of multielectron species i...

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  19. The maximum number of unpaired electrons can present in p(x) orbital i...

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  20. The number of electrons present in 'M' shell of silicon is

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