Question

Which of the following is wrong of Bohr’s model?
A. It establishes stability of atom
B. It is inconsistent with Heisenberg uncertainty principle
C. It explains the concept of spectral lines for hydrogen like species
D. Electrons behave as particle and wave

Answer 1

Hint: Neils Bohr was the first to explain quantitatively the general features of hydrogen atom structure and its spectrum. According to his model, it is considered that the electron in the atom moves in a circular orbit.

Complete answer:
Neils Bohr was the Danish physicist that works on the hydrogen atom and demonstrates the structure and spectrum of this atom. He had given some postulates on which his model is completely based. These are:
1. The electron in the hydrogen atom can move around the nucleus in a circular path having fixed radius and energy. These paths are called orbits. These orbits are arranged concentrically around the nucleus in which the electron moves.
2. The energy of an electron that is present in the orbit does not change with time. However, the electron will move on the basis of energy that means electron moves from a lower stationary state to higher stationary state when it absorbs the energy or when it emitted the energy, electron moves from higher energy state to lower stationary state.
3. The frequency of radiation gets absorbed or emitted when transition occurs between two stationary states. This is measured by the difference in energy and is expressed by the expression i.e. commonly known as Bohr’s frequency rule.
4. The angular momentum of an electron in a given stationary state can be expressed by an equation which simply explains that the angular momentum is the integral multiple of $\dfrac{h}{{2\pi }}$. That's why only certain fixed orbits are allowed.

The correct option is D i.e. Electrons behave as particles and waves.

Note:
the behavior of the electrons as particle and wave id given by Louis De Broglie. According to him, the electrons exhibit dual nature i.e. having both particles as well as wave-like properties. This means that like the photon, electrons too have wavelength as well as momentum.