Question

Which of the following is an inert gas group?
1. Alkaline metal group
2. 16th group
3. Halogen group
4. 18th or zero group

Answer 1

Correct Answer - Option 4 : 18th or zero group

The correct answer is 18th or zero group.

• The noble gases (Group 18) are located in the far right of the periodic table and were previously referred to as the "inert gases" due to the fact that their filled valence shells (octets) make them extremely non-reactive.
• Noble gases are said to be zero group elements because they have zero valencies and they cannot combine with other elements to form compounds.
• The zero group elements are Helium, Neon, Argon, Krypton, Xenon, and Radon.

• The discoverers of noble gases are :

  Helium	Pierre Janssen and Joseph Norman Lockyer
  Neon	William Ramsay
  Argon	Lord Rayleigh and William Ramsay
  Krypton	William Ramsay
  Xenon	William Ramsay
  Radon	Friedrich Ernst Dorn