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As the nuclear charge increases from neo...

As the nuclear charge increases from neon to calcium, the orbital energies

A

increases

B

increase rapidly

C

increase very slowly

D

fall

Text Solution

Verified by Experts

The correct Answer is:
D
Energies associated with different orbitals falls with increase in atomic number.
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As the nuclear charge increases form neon to calcium, the orbital energies

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An energy of 68eV is required to excite a hydrogen like atom from its second Bohr orbit to the third. The nuclear charge is Ze. Find the value of Z, the kinetic energy of the electron in the first Bohr orbit and the wavelength of the radiation required to eject the electrons from the first Bohr orbit to infinity.

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Nuclear charge actually experienced by an electron is termed as effective nuclear charge The effective nuclear Z^(**) actually depends on type of shell and orbital in which electron is actually present. The relative extent to which the various orbitals penetrate is . s gt p gt d gt f (for the same value of n) The phenomenon in which penulitmate shell electrons act as screen or shield in between nucleus adn valence shell electrons and there by reducing nuclear charge is known as sheilding 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 ionizatio energy. Which of the following is not concerned to effective nuclear charge?

DINESH PUBLICATION-ATOMIC STRUCTURE-Revision Questions
  1. The correct orders of increasing energy of atomic orbitals is

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  2. Which of the following is not isoelectronic ?

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  3. As the nuclear charge increases from neon to calcium, the orbital ener...

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  4. The value of the energy for the first excited state of hydrogen will b...

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  5. In hydrogen atom, energy of first excited state is - 3.4 eV. Then, KE...

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  6. The energy of the first electron in helium will be

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  7. In a hydrogen atom, if energy atom, if energy of an electron in group ...

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  8. In the Bohr's orbit, what is the ratio of total kinetic energy and tot...

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  9. The configuration 1s^(2) 2s^(2) 2p^(5) 3s^(1) shows

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  10. The ratio between kinetic enegry and total enegry of the electrons of ...

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  11. The value of Planck's constant is 6.63 xx 10^(-34)Js. The velocity of ...

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  12. In Bohr series of lines of hydrogen spectrum, third line from the red ...

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  13. The de-Broglie wavelength of a tennis ball mass 60 g moving with a ve...

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  14. The orbital angular momentum for an electron revolving in an orbit ...

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  15. The number of d-electrons retained in Fe^(2+) (At. no. of Fe = 26) ion...

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  16. The angular momentum of electron in nth orbit is given by

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  17. Configuration of 5p^(1) is

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  18. Number of orbitals present in 3rd shell is

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  19. RUTHERFORD'S NUCLEAR MODEL OF ATOM

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  20. Rutherford's model suggests the existence of

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