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Some Nobel gases are given below: A: Neon B: Helium C: Radon D: Argon Arrange them according to their Atomic Number (Lowest → Highest)

Some Nobel gases are given below: A: Neon B: Helium C: Radon D: Argon Arrange them according to their Atomic Number (Lowest → Highest) Correct Answer B → A → D → C

The correct answer is B → A → D → C.

Key Points

  • Nobel Gasses:
    • Noble gases belong to Group 18.
    • They are located in the far right of the periodic table.
    • They are often termed Inert gases as they complete the octet.
    • This makes them very stable as there is no tendency to lose or gain an electron.
    • Nobel gasses are a group of chemical elements that do not interact with other elements in a manner.
    • General because their electron orbits are complete and filled with electrons.
    • ​Helium, Neon, Argon, Krypton, Xenon and Radon are Nobel gasses.
    • These elements are in the eight groups of the periodic table.
    • Nobel gasses contain 0.93% of the atmospheric volume and 1.29% of its mass.​
    • They are also known as Zero group elements.
    Properties of Nobel Gasses:
    • No colour and no smell.
    • Have 8 electrons equivalent.
    • Found in the form of single-atom gases.
    • The very weak internal attraction between their atoms.
    • It has very low melting and boiling grades.

Additional Information

Nobel Gas Atomic No Molar mass
Helium (He) 2 4.00
Neon (Ne) 10 20.18
Argon (Ar) 18 39.95
Krypton (Kr) 36 83.80
Xenon (Xe) 54 131.30
Radon (Rn) 86 222

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