Fill in the blanks.

Question 11 Mark

Quantum condition of angular momentum of electron according to Bohr's proposal is $...............$

Answer

$m v r=\frac{n h}{2 \pi}$.

Question 21 Mark

The required minimizes energy for electron of atom, to make force from lowest level is $...............$

Answer

$13.6$ eV

Question 31 Mark

Radius of nucleus of atom is of the order of $...............$

Answer

$10^{-15}$ meter

Question 41 Mark

Radius of atom is of the order of $...............$

Answer

$10^{-10}$ meter

Question 51 Mark

On the basis of Thomson Atomic model, scattering of $...............$ cannot be explained.

Answer

Scattering

Question 61 Mark

Required energy given to atom for excited state from its ground state is called $...............$

Answer

Excitation energy

Question 71 Mark

According to Bohr electron can revolves only around those orbits, for which angular momentum is multiple integer of $...............$

Answer

$\frac{h}{2 \pi}$

Question 81 Mark

$...............$ of the atom is concentrate at tiny space .

Answer

Positive charge

Question 91 Mark

According to Rutherford, in the nuclei of different metals $...............$ values are different.

Answer

Positive charges

Physics Fill in the blanks.