What are Noble Gases? | Properties of Noble Gas

Noble Gas: Noble gases are also known as inert gases or aerogens are a group of elements that belong to the Group 18 of the modern periodic table. Noble gas and its properties is regarded as an important topic in competitive exams like SSC CHSL, SSC CGL, Railways and other exams.

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In this blog, we are going to discuss noble gas and their properties.

What are Noble Gases?

Noble gases are a group of elements that are also known as inert gas or aerogens. They belong to group 18 of the modern periodic table. Under standard conditions of temperature and pressure, all the noble gases exist in the gaseous phase.

The elements falling under the Noble gases are as follows:

  • Helium (He)
  • Neon (Ne)
  • Argon (Ar)
  • Krypton (Kr)
  • Xenon (Xe)
  • Radon (Rn)

Properties of Noble Gases

  • Noble gases are also called as inert gases
  • The inert nature of the noble gases is due to the stable electronic configuration they possess.
  • The electronic configuration of noble gases can be represented by ns2np6 which shows that the outermost shell of valence electrons is full.
  • The noble gases are unreactive or are extremely low reactive in nature
  • They exist as monoatomic gases due to their low reactive nature.
  • They are colourless, odourless in nature.
  • The melting and boiling point of these gases is very close to each other.


  • Name: Helium
  • Symbol: He
  • Atomic Number: 2

Properties of Helium

  • Helium is the most abundant gas in the universe
  • Helium is used in combination with oxygen by deep sea divers and for artificial respiration for patients.
  • Most of the element Helium present in earth is formed from radioactive decay
  • It is also filled in aeroplane tyres due to its non combustibe nature.
  • It is also used in tourist baloons
  • It is the second most lightest element in periodic table.


  • Name: Neon
  • Symbol: Ne
  • Atomic Number: 10

Properties of Neon

  • Neon was first isolated by William Ramsay and Morris in 1898.
  • Neon has three stable isotopes
  • It is used for manufacturing high-voltage indicators, diving equipment, television tubes etc.


  • Name: Argon
  • Symbol: Ar
  • Atomic Number: 18

Properties of Argon

  • John W. Strutt and William Ramsay isolated Argon
  • Argon and Nitrogen Mixture is used to make electric bulb
  • It is used to make argon laser


  • Name: Krypton
  • Symbol: Kr
  • Atomic number: 36

Properties of Krypton

  • Krypton is used in incandescent lightbulbs.


  • Name: Xenon
  • Symbol: Xe
  • Atomic Number: 54

Properties of Xenon

  • William Ramsay and Morris Travers discovered Xenon
  • Xenon is used in medical field as general anaesthetic and for imaging
  • It is used in photographic flash


  • Name: Radon
  • Symbol: Rn
  • Atomic number: 86

Properties of Radon

  • Radon was detected from the radioactive decay of Radium
  • It is the most dense noble gase
  • It is highly radioactive and chemically unreactive in nature
  • It is used in radiation therapy for treatment of some forms of cancer


That was all about the noble gases and their properties. For more interesting updates, stay connected to Oliveboard.


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