JEE PHYSICS MCQ: ATOMS

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Consider a hydrogen like atom in Bohr's model. It is given that difference between

(n+1)^{\text {th}}

Bohr's radius and

n^{\text {th}}

Bohr's radius is equal to

(n-1)^{\text {th}}

Bohr's radius, then the energy of

n^{\text {th}}

state (in

\mathrm{eV}

) is [

{Z}=

atomic number]

View answer and explanation

Correct option: A

-0.85 ~Z^2

Option A (-0.85 Z²) is correct because it is the energy of the nth state calculated after finding the value of n using the given condition on Bohr's radii.

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The de-Broglie wavelength of an electron in the first Bohr orbit is The volume occupied by an atom is greater than the volume of the nucleus by a factor of about For a hydrogen atom, when electron jump from

n

=2

{n}=1

, then wave length of radiation emitted found to be

\lambda_0

. Then, for which transition of electron of a 'He' atom, the wavelength of radiation emitted will be equal to '

\lambda_0

'. Energy of characteristic X-ray is a consequence of Taking Rydberg’s constant

{R_H} = 1.097\,\, \times \,\,{10^7}\,\,m

, first and second wavelength of Balmer series in hydrogen spectrum is When hydrogen atom is in its first excited level, its radius is its ground state radius