Embibe Experts Solutions for Chapter: Atoms, Molecules and Nuclei, Exercise 1: Maharashtra Board-2019

The momentum associated with photon is given by ____.

Calculate the de-Broglie wavelength of an electron moving with one fifth of the speed of light. Neglect relativistic effects.($h=6.63\times {10}^{-34} \mathrm{J} \mathrm{s}, c=3\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}$ , mass of electron, $m_e=9\times {10}^{-31} \mathrm{kg}$)

Draw a neat and labelled energy level diagram and explain Balmer series and Brackett series of spectral lines for hydrogen atom.

An electron of energy $150 \mathrm{eV}$ has wavelength of ${10}^{-10} \mathrm{m}$. The wavelength of a $0.60 \mathrm{keV}$ electron is

In hydrogen atom, electron jumps from the $3^{\mathrm{rd}}$ orbit to the $1^{\mathrm{st}}$ orbit. The change in angular momentum is _____.

State the name of the visible series in hydrogen spectrum.

State any two postulates of Bohr’s theory of hydrogen atom.

Energy of an electron in the second Bohr orbit is $–3.4 \mathrm{eV}$. Calculate the energy of an electron in the third Bohr orbit.