Question

What do helium and argon have in common?
1. Both elements are liquid metals.
2. The outermost shells of both are fully filled.
3. Both have high diffusion rates.
4. Both metals are used in balloons.

Answer 1

Correct Answer - Option 2 : The outermost shells of both are fully filled.

The correct answer is The outermost shells of both are fully filled.

• The filled outer shells of Group VIIA of the noble gases make all members of this family ( including Helium, Neon, and Argon) the most stable of all the elements.
  • These three elements have this property in common, a filled stable outer electron shell.

• These gases all have similar properties under standard conditions: they are all odorless, colorless, monatomic gases with very low chemical reactivity.
• The six noble gases that occur naturally are helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn).
• Argon makes blue light, and neon makes the clear orange-red that is familiar in neon signs, said Bill Concannon, a neon-sign artist, and owner of Aargon Neon, a sign shop in Crockett, California.
• Argon is neither flammable nor reactive. If a tank of argon is heated or punctured, the tank may rupture and cause physical injury.