The possible quantum number for $3d$ electron are
$n = 3,\,l = 1,\,{m_l} = + 1,\,{m_s} = - \frac{1}{2}$
$n = 3,\,l = 2,\,{m_l} = + 2,\,{m_s} = - \frac{1}{2}$
$n = 3,\,l = 1,\,{m_l} = - 1,\,{m_s} = + \frac{1}{2}$
$n = 3,\,l = 0,\,{m_l} = + 1,\,{m_s} = - \frac{1}{2}$
The wavelengths of ${K_\alpha }$ $X-$ rays of two metals $'A'$ and $'B'$ $\frac{4}{{1875R}}$ and $\frac{1}{{675R}}$ respectively, where $'R'$ is Rydberg's constant. The number of elements lying between $'A'$ and $'B'$ according to their atomic numbers is
In Bohr model of hydrogen atom, the force on the electron depends on the principle quantum number as
According to the classical electromagnetic theory, calculate the initial frequency of the light emitted by the electron revolving around a proton in hydrogen atom.
What radioactive source did the Geiger and Marsden use in the scattering experiment?
The wavelength of ${K_\alpha }$ line for an element of atomic number $29$ is $\lambda $ . Then the wavelength of ${K_\alpha }$ line for an element of atomic no $15$ is (Take mosley‘s constant $b = 1$ for both elements)