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प्रश्न
According to Bohr, 'Angular momentum of an orbiting electron is quantized'. What is meant by this statement?
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उत्तर
This means that electron revolves around the nucleus in fixed i.e., quantized orbits and do not radiate energy i.e., angular momentum in these orbits is an integral multiple of `h/(2pi)`, where h is Planck's constant.
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संबंधित प्रश्न
The radius of the innermost electron orbit of a hydrogen atom is 5.3 × 10−11 m. What are the radii of the n = 2 and n = 3 orbits?
In Bohr’s model of the hydrogen atom, the radius of the first orbit of an electron is r0 . Then, the radius of the third orbit is:
a) `r_0/9`
b) `r_0`
c) `3r_0`
d) `9r_0`
Using Bohr’s postulates, obtain the expression for the total energy of the electron in the stationary states of the hydrogen atom. Hence draw the energy level diagram showing how the line spectra corresponding to Balmer series occur due to transition between energy levels.
Calculate the magnetic dipole moment corresponding to the motion of the electron in the ground state of a hydrogen atom.
Calculate the de-Broglie wavelength associated with the electron revolving in the first excited state of the hydrogen atom. The ground state energy of the hydrogen atom is −13.6 eV.
According to Bohr's theory, an electron can move only in those orbits for which its angular momentum is integral multiple of ____________.
Which of these statements correctly describe the atomic model according to classical electromagnetic theory?
When an electric discharge is passed through hydrogen gas, the hydrogen molecules dissociate to produce excited hydrogen atoms. These excited atoms emit electromagnetic radiation of discrete frequencies which can be given by the general formula
`bar(v) = 109677 1/n_1^2 - 1/n_f^2`
What points of Bohr’s model of an atom can be used to arrive at this formula? Based on these points derive the above formula giving description of each step and each term.
Use Bohr's postulate to prove that the radius of nth orbit in a hydrogen atom is proportional to n2.
Calculate the radius of the second orbit of He+.
