A. Coinage metals
B. Alkali metals
C. Halogens
D. Noble gases
Answer
Correct Answer: D. Noble gases
Detailed About MCQs
The Noble gases also called the inert gases or aerogens. There are seven noble gases in group 18 of the periodic table, In which six are naturally occurring noble gases. They are:
- Helium (He)
- Neon (Ne)
- Argon (Ar)
- Krypton (Kr)
- Xenon (Xe)
- Radioactive Radon (Rn)
- Oganesson (Og) (its chemistry has not yet been investigated)