S C Kheterpal, S N Dhawan and, P N Kapil Solutions for Chapter: Structure of Atom, Exercise 14: Competition Focus

Which of the following feature of an atom is not a direct result of Rutherford's experiment?

For hydrogen atom, Rydberg constant $\left({\mathrm{R}}_{\mathrm{H}}\right)$ is $\mathrm{x} {\mathrm{m}}^{-1}$. Then for ${\mathrm{He}}^{+}$ ion, the corresponding value of this constant will be

Frequency of the $\mathrm{X}$-rays emitted by an element is $100 {\mathrm{s}}^{-1}$. If constants in the Moseley equation are $\mathrm{a}=\mathrm{b}=1$, the element will be

The energy of the electron in the third orbit will be

The radius of the third orbit of hydrogen atom will be

The velocity of the electron in the third orbit of hydrogen atom will be

If the electron absorbs $12.1 \mathrm{eV}$ of energy, it will jump to the orbit

For the hydrogen atom, the only CORRECT combination is