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Bohr's Model Of An Atom - Practice Questions & MCQ

Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET

Quick Facts

  • Radius, velocity and the energy of nth Bohr orbital is considered one the most difficult concept.

  • 32 Questions around this concept.

Solve by difficulty

Which of the following statements in relation to the hydrogen atom is correct?

Calculate the energy in joule corresponding to light of wavelength 45 nm : (Planck's constant h = 6.63 x 10-34 Js;

speed of light c = 3 x 108 ms -1)

According to the Bohr Theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?

Concepts Covered - 2

Bohr’s Model for Hydrogen Atom

Bohr's model :

1. Force of attraction between the nucleus and an electron is equal to the centripetal force.

2. mvr= nh/2\pi ,  n = principal quantum number.

3. Energy can be absorbed or emitted when electron transfer orbit  E_{1}-E{_{2}}=h\nu

Bohr’s Model for Hydrogen Atom/Hydrogen-like atoms :

The frequency of radiation (ν) absorbed or emitted when electron jumps between two stationary states that differ in energy by ∆E, is given by:

v= \Delta E/h= \left ( E_{2} -E_{1}\right )/h

E2 is higher energy state and E1 is lower energy state

Radius, velocity and the energy of nth Bohr orbital

 

Bohr radius of nth orbit:

r_{n}= 0.529 \frac{n^{2}}{z}A^{0}

where Z is atomic number

Velocity of electron in nth orbit:

v_{n}= (2.165\times 10^{6})\frac{z}{n}\: m/s

where z is atomic number

Total energy of electron in nth orbit:

E_{n}= -13.6\: \frac{z^{2}}{n^{2}}eV

Where z is atomic number

Study it with Videos

Bohr’s Model for Hydrogen Atom
Radius, velocity and the energy of nth Bohr orbital

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