Umakant Kondapure, Collin Fernandes, Nipun Bhatia, Vikram Bathula and, Ketki Deshpande Solutions for Chapter: Atoms, Molecules and Nuclei, Exercise 1: Classical Thinking

Nucleons are

In Davisson and Germer's experiment, accelerating potential is kept constant at $54 \mathrm{V}$. As the detector is rotated, the first intensity maximum is obtained at an angle of

($e = 1.6\times {10}^{-19} \mathrm{C}$, $m$$=$$9.1\times {10}^{-31}$$\mathrm{kg}$)

The solution of Bragg's equation will not exist if
 

Figure shows the energy levels $P, Q, R, S$ and $G$ of an atom where, $G$ is the ground state. A red line in the emission spectrum of the atom can be obtained by an energy level change from $Q$ to $S$. A blue line can be obtained by which of the following energy level change?

What will be ratio of radii of ${\mathrm{Li}}^7$ nucleus to ${\mathrm{Fe}}^{56}$ nucleus?
 

The minimum energy required to excite a hydrogen atom from its ground state is
 

The ratio of areas within the electron orbits for the first excited state to the ground state for hydrogen atom is
 

Assertion: Plutonium is a transuranic element.

Reason: The materials which can undergo fission easily are called transuranic element.