The crucial difference in between hydrogen and helium emission spectra is that the helium emission spectrum (plu. spectra) has actually more lines than that of the hydrogen emission spectrum (plu. spectra).

You are watching: Why does helium have more spectral lines than hydrogen

The emission spectrum of a chemical element or compound is the series of lines that represent the wavelengths of electromagnetic radiation emitted by that chemical element while the shift of an electron from a high power level to a low energy level.

CONTENTS

1. Outline and Key Difference2. What is Hydrogen Emission Spectra3. What is Helium Emission Spectra4. Side by Side Comparichild – Hydrogen vs Helium Emission Spectra in Tabular Form5. Summary

What is Hydrogen Emission Spectra?

The hydrogen emission spectrum is a spectrum produced by the emission of light by hydrogen atoms in excited says. Tright here, once we pass a beam of white light through a sample of hydrogen gas, then the atoms absorb energy. After that, the electron in the hydrogen atom gets excited to a greater power level. However before, since residing in a high energy level is unsteady, these electrons tfinish to come back to the ground level (energy level at which they existed previously) emitting a photon as electromagnetic radiation that has actually an power equal to the power difference in between these greater and also reduced power levels.


Figure 01: Hydrogen Emission Spectrum


Additionally, the amount of power at each energy level is a addressed worth. Thus, the shift will always develop a photon via the exact same energy. We have the right to observe the emission spectrum as coloured light on a babsence background. However before, the variety of lines we can observe below is less than that of the helium emission spectrum.

What is Helium Emission Spectra?

The helium emission spectrum is a spectrum produced by the emission of light by helium atoms in excited states. It has even more lines in it compared to hydrogen emission spectrum. It is mainly because the helium atom has more electrons than a hydrogen atom. Because of this, more electrons get excited when we pass a white light beam via a helium sample, and also it causes the emission of even more spectral lines.


Figure 02: Helium Emission Spectrum


Unfavor in hydrogen, there are electron-electron repulsions and various nuclei-electron attractions in the helium atom. As such, various spectra (various from hydrogen) comes out via different wavelengths for the helium atom.


What is the Difference Between Hydrogen and also Helium Emission Spectra?

The hydrogen emission spectrum is a spectrum created by the emission of light by hydrogen atoms in excited states. On the various other hand also, the helium emission spectrum is a spectrum created by the emission of light by helium atoms in excited claims. And, the crucial distinction between hydrogen and helium emission spectra is that the helium emission spectrum has even more lines than that of the hydrogen emission spectrum. It is mainly bereason hydrogen has one electron per atom while helium has two electrons per atom.

Additionally, a far-reaching distinction in between hydrogen and helium emission spectra is that tbelow is no result from electron-electron repulsions on hydrogen emission spectra because of the existence of a single electron in hydrogen atom whereas electron-electron repulsions affect the helium emission spectra because of the visibility of 2 electrons.

See more: Why Does Ant Man Ask For Orange Slices, Does Anyone Have Any Orange Slices

Summary – Hydrogen vs Helium Emission Spectra

The emission spectrum is a spectrum that shows a collection of lines on a black background. Here, the emission of light by hydrogen atoms in excited says produces the hydrogen emission spectrum. Whereas, the emission of light by helium atoms in excited claims produces the helium emission spectrum. The key difference between hydrogen and also helium emission spectra is that the helium emission spectrum has more lines than that of the hydrogen emission spectrum.

Reference:

1. Libremessages. “6.3: Line Spectra and the Bohr Model.” Chemisattempt LibreTexts, National Science Foundation, 26 Nov. 2018. Available here 2. “Hydrogen Spectral Series.” Wikipedia, Wikimedia Foundation, 4 Nov. 2018. Available here 

Image Courtesy:

1.”Bright-line Spectrum-Hydrogen”By Patrick Edwin Moran – Own occupational, (CC BY-SA 3.0) using Commons Wikimedia 2.”Helium Emission Spectrum”By Jkasd – Own work-related making use of data from NIST., (CC BY 3.0) through Commons Wikimedia