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Atomic and Ionic Sizes of Lanthanides

40. The numbe...

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40. The number of degenerate orbitals present in an energy level of a H-atom characterized by E = -R/16 where R is the Rydberg constant is: A. 16. B. 9. C. 4. D. 1

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Q. The number of degenerate orbitals in an energy level of

H

E_{n} = - \frac{R h}{9}

R h

1 R h = 2.18 \times 10^{- 18} J

Q. What is the degeneracy of the hydrogen atom energy level that has the energy

(- \frac{R_{H}}{9})

R_{H}

is Rydberg energy constant)

H

-atom or one electron system energy levels of orbitals of a shell are degenerates whereas in many electron system energy levels of orbitals of a shell are non degenerates because of :

Q. Energy of an electron in an orbit of

H

- \frac{R_{H}}{4}

. The no. of degenerate orbitals in this orbit are :

Q. The radius of an orbit in a Hydrogen - like atom is

4.5 a_{0}

a_{0}

is the Bohr radius. Its orbital angular momentum is

\frac{3 h}{2 π}

, it is given that

h

is Planck's constant and

R

is Rydberg constant. The possible wavelength when the atom de-excites from the given state to the ground state is:

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Atomic and Ionic Sizes of Lanthanides

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