List of top Physics Questions on Atomic Structure asked in JEE Main

In Rutherford's alpha-particle scattering experiment, only a few alpha particles rebound back because:
A. The size of gold nucleus is very small as compared to the size of gold atom.
B. Alpha particle and gold nucleus have equal charge.
C. The impact parameter is minimum for a few alpha particles.
D. A few alpha particles have very high kinetic energy.
E. Only a few alpha particles undergo head-on collision with the nuclei.
Choose the correct answer from the options given below:
An electron in a hydrogen-like atom has energy equal to \( -0.04 E_0 \), where \( E_0 \) is the magnitude of energy of this electron in ground state in eV. If the angular momentum of this electron is \( L \), then the value of \( \frac{2 \pi L}{h} \) is (where \( h \) is Planck's constant).
In a hydrogen-like ion, the energy difference between the 2nd excitation energy state and ground is 108.8 eV. The atomic number of the ion is:

An electron revolving in the \( n^{th} \) Bohr orbit has magnetic moment \( \mu \). If \( \mu_n \) is the value of \( \mu \), the value of \( x \) is:

Radius of a certain orbit of hydrogen atom is 8.48 Å. If energy of electron in this orbit is E/x, then x = ______.
(Given a0 = 0.529Å, E = energy of electron in ground state)
An electron of a hydrogen atom in an excited state is having energy \( E_n = -0.85 \, \text{eV} \). The maximum number of allowed transitions to lower energy levels is \( \ldots \).