S C Kheterpal, S N Dhawan and, P N Kapil Solutions for Chapter: Structure of Atom, Exercise 12: TEST YOUR GRIP

The different orbits or energy levels of an atom according to Bohr model are called _____ states (Quantum / Stationary / excited)

If Bohr radius is represented by ${\mathrm{a}}_0,$ the radius of the second orbit of helium ion $\left(\mathrm{H}{\mathrm{e}}^{+}\right)$ will be _____ $\stackrel{°}{\mathrm{A}}$. 

If ${\mathrm{v}}_0$ is the velocity of the electron in the first orbit of the hydrogen atom, then the velocity of the electron in the third orbit of $\mathrm{L}{\mathrm{i}}^{2+}$ ion will be $\mathrm{X}$ $\times {10}^{6 }\mathrm{m}/\mathrm{s}$. Then, find the value of $\mathrm{X}$ to the nearest integer value.

If an electron is accelerated by a potential of $\mathrm{V}$ volts, the wavelength acquired by the electron will be _____.

$\mathrm{A}:\frac{\mathrm{h}}{\sqrt{\left(4\mathrm{meV}\right)}} \mathrm{B}:\frac{\mathrm{h}}{\sqrt{\left(2\mathrm{meV}\right)}} \mathrm{C}:\frac{\mathrm{h}}{\sqrt{\left(8\mathrm{meV}\right)}}$(Enter your correct answer as $\mathrm{A}, \mathrm{B} \mathrm{or} \mathrm{C}$)

According to Heisenberg’s uncertainty principle, the product of uncertainty in position and uncertainty in momentum should be $\ge$_____.

$\mathrm{A}:\frac{\mathrm{h}}{4\mathrm{\pi }} \mathrm{B}:\frac{\mathrm{h}}{2\mathrm{\pi }} \mathrm{C}:\frac{\mathrm{h}}{\mathrm{\pi }}$(Enter your correct answer as $\mathrm{A}, \mathrm{B} \mathrm{or} \mathrm{C}$)

The quantum number which tells about the angular momentum of the different electrons present in an atom is called _____ quantum number.

The quantum number which tells about the orientation of different orbitals of an atom is called _____ quantum number.(Magnetic/Spin)

The IUPAC name of the element with atomic number $104$ is _____.