hydrogen emission spectrum.pptx

Consider a sample of hydrogen gas in the glass discharge tube. The electric current is passed through the hydrogen gas present in the discharge tube under low pressure. When the hydrogen atoms absorb energy from the electric discharge, they get excited to higher energy states. And the unsettled electron in the excited state then returns to its initial position with the emission of photons of suitable wavelengths.
Now, the hydrogen gas in the discharge tube glows red indicating, the electron transition between the two different energy levels. And the emitted light radiation is passed through the slit and made to fall on the glass prism that separates the light radiation into constituent wavelengths. Finally, the photographic plate placed over there records the line emission spectrum of hydrogen.
The spectrum contains a set of lines in the ultraviolet, visible, and infrared regions. And the wavelength of lines obtained below 400 nm falls in the ultraviolet part of the electromagnetic spectrum. Similarly, wavelengths of lines obtained above 700 nm are in the infrared zone. The spectral lines in the visible region have wavelengths between 400-700 nm. The different wavelengths of light energy produced by hydrogen atoms are also known as the hydrogen light spectrum.

1. Hydrogen emission spectrum By Jayam chemistry learners

2. Spectrum Spectrum is an arrangement of radiations of various wavelengths obtained by passing polychromatic radiation through the prism. Jayam chemistry learners

3. Hydrogen Spectrum The pattern of spectral lines given by the hydrogen atom in the electromagnetic region due to the transition of electrons is called the hydrogen spectrum. Jayam chemistry learners

4. Types of Hydrogen Spectrum The hydrogen spectrum is of two types : Hydrogen emission spectrum Hydrogen absorption spectrum Jayam chemistry learners

5. Hydrogen Emission Spectrum It is a specimen of bright lines obtained by passing emitted polychromatic light radiations of the excited hydrogen atom through the prism. It consists of bright lines on continuous spectrum of black background Jayam chemistry learners

6. Hydrogen absorption Spectrum It is a pattern of dark lines obtained by transmitting an absorbing polychromatic light radiations of the ground state hydrogen atom through the prism. It consists of dark lines on continuous spectrum of white background Jayam chemistry learners

7. Experimental set up for the hydrogen emission spectrum Consider a sample of hydrogen gas in the discharge tube. The electric current is passed through the hydrogen gas present in the discharge tube under low pressure. When the hydrogen atoms absorb energy from the electric discharge, they get excited to higher energy states. And the unsettled electron in the excited state returns to its initial position with the emission of photons of suitable wavelengths. Jayam chemistry learners

8. Experimental set up for the hydrogen absorption spectrum Consider a sample of hydrogen gas in the discharge tube. A white light passes through the hydrogen gas in present in the discharge tube. And the transmitted light then passes through the spectroscope gives a spectrum of dark lines at definite wavelengths. These dark lines correspond to the wavelengths of light radiations absorbed by the hydrogen atoms. Jayam chemistry learners

9. Overview of the Hydrogen Spectrum The pattern of spectral lines observed in both the emission and absorption spectrums of hydrogen are identical at the same temperature. These spectral lines occur in the ultraviolet, visible, and infrared regions of the electromagnetic spectrum. The different wavelengths of light energy produced by hydrogen atoms is known as the hydrogen light spectrum . Jayam chemistry learners

10. Overview of the Hydrogen Spectrum In the visible zone, four different spectral lines observed at wavelengths 656 nm, 486 nm, 434 nm, and 410 nm give characteristic red, aqua, blue and violet colored lines in the visible emission spectrum of hydrogen. It is known as the hydrogen color spectrum. Jayam chemistry learners

11. Overview of the Hydrogen Spectrum The colored spectral emissions in the visible region are noticeable to the human eye. Besides, special spectrographic techniques are essential to observe the spectral lines in the ultraviolet and infrared regions. Jayam chemistry learners

12. T he Hydrogen Line Spectrum The absorption of electric energy excites the hydrogen electron from the ground state to one of the higher energy orbits. After being unstable, the electron bounces back to its initial position abruptly with the emission of photons of discrete frequencies. Jayam chemistry learners

13. T he Hydrogen Line Spectrum These individually distinct spectral lines relate to the sporadic photon emissions by the energy quantization principle mentioned by Bohr. Hence, the hydrogen spectrum is discontinuous with a series of sharp lines separated by dark bands is also known as a line spectrum. Jayam chemistry learners

14. Name the series of the Hydrogen Spectrum The hydrogen spectrum has six series named by the scientists who discovered them. They are; Lyman series Balmer series Paschen series Brackett series Pfund series Humphreys series Jayam chemistry learners

15. Applications of the Hydrogen Spectrum Many street lights use bulbs that contain sodium or mercury vapor. For sodium, the emission lines at 450 nm give characteristic yellow light. For mercury, blue colored light observed due to spectral emissions at 589 nm Jayam chemistry learners

16. Applications of the Hydrogen Spectrum Each atom has its characteristic emission and absorption spectra. It serve as a fingerprint to characterize them. It helps in the identification of new substances in the universe. Jayam chemistry learners

17. The end For more interesting topics of chemistry, kindly visit; Jayam chemistry learners