What is the 2nd postulate of Bohr?

Postulate II According to this postulate: An electron revolves around the nucleus in orbits. Hence, the angular momentum (L) of the orbiting electron is: L = nh/2p.

What is de Broglie explanation?

de Broglie wave noun. : the hypothetical wave train that in wave-mechanical theory corresponds to a moving elementary particle (as an electron or proton), moves with it, and gives the particle certain wave properties (as interference and diffraction)

Can de Broglie hypothesis be used to comment on Bohrs second postulate?

According to de-Broglie hypothesis, a stationary orbit is the one that contains an integral number of de-Broglie waves associated with the revolving electron. 2πrn=nλ, where λ is the wavelength. This is Bohr’s second postulate of quantisation of orbital angular momentum.

Which physical quantity is quantised in Bohrs second postulate?

Bohr’s second postulate in Bohr model of hydrogen atom deals with quantisation of angular momentum.

Which one of the following is a postulate of Bohrs atomic theory?

Bohr’s model of the hydrogen atom is based on three postulates: (1) an electron moves around the nucleus in a circular orbit, (2) an electron’s angular momentum in the orbit is quantized, and (3) the change in an electron’s energy as it makes a quantum jump from one orbit to another is always accompanied by the …

What is Bohr’s third postulate?

What is de Broglie equation?

The de Broglie equation is an equation used to describe the wave properties of matter, specifically, the wave nature of the electron:​ λ = h/mv, where λ is wavelength, h is Planck’s constant, m is the mass of a particle, moving at a velocity v. de Broglie suggested that particles can exhibit properties of waves.

How does the Bohr theory explain the line spectrum of hydrogen?

Niels Bohr explained the line spectrum of the hydrogen atom by assuming that the electron moved in circular orbits and that orbits with only certain radii were allowed. The orbit closest to the nucleus represented the ground state of the atom and was most stable; orbits farther away were higher-energy excited states.

Why is Bohr quantized angular momentum postulate?

According to Bohr’s atomic model, the angular momentum of electrons orbiting around the nucleus is quantized. This postulate regarding the quantisation of angular momentum of an electron was later explained by Louis de Broglie. According to him, a moving electron in its circular orbit behaves like a particle-wave.

What are the postulates of Bohrs model of an atom Class 9?

Postulates of Bohr’s Model of an Atom

• In an atom, electrons (negatively charged) revolve around the positively charged nucleus in a definite circular path called orbits or shells.
• Each orbit or shell has a fixed energy and these circular orbits are known as orbital shells.

Which of the following postulates of the Bohrs model led to the quantization of energy of the hydrogen atom?

the magnitude of the linear momentum of the electron is qunatized. Quantization of energy is itself a postulate of the bohr model. bohr’s quantization condition of angular momentum i.e., L=nh2π led to the quantization of energy.

What are Bohrs postulates?