Question

ATOMIC SPECTRA OF HYDROGEN AND THE BOHR THEORY​ bhdk

Answer 1

Answer:

Explanation:

Bohr Model of the Hydrogen Atom. Bohr Model of the hydrogen atom attempts to plug in certain gaps as suggested by Rutherford's model by including ideas from the newly developing Quantum hypothesis. Bohr postulated that in an atom, electrons could revolve in stable orbits without emitting radiant energy.

Answer 2

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ATOMIC SPECTRA OF HYDROGEN

Let us pass electric current through the discharge tube. The gas emits blue light, because the atoms of hydrogen gas gain energy from the current and get excited. When the excited atoms return to the normal state, they emit energy, in the visible region, which appears blue. If this blue light is passed through a prism, the light breaks into 5 colours apearing as lines of four colours. This is known as the line emission spectrum of hydrogen. 

When the spectrum of investigated in infra red and ulltraviolet regions, more lines were found, which were given different names. Such as, Lyman, Balmer, Paschen, Brackett and Pfund series.

Bohr's Atomic Theory

Bohr proposed his atomic model based on the quantum theory of radiation. His main postulates were :An electron can revolve around a nucleus not in an random orbit but only in certain definite circular orbit having a well defined energy.

These orbits are called as stationary orbits.When travelling in a stable orbit with lowest energy, an electron emits no electromagnetic energy.Emission or absorption of energy takes place when an electron jumps from one stationary orbit to another.

The difference in energy is related to the frequency of the radiation absorbed or emitted. With this model he explained characteristic spectra of different atoms and other properties. It was possible to calculate the hydrogen atom spectrum with this model.