Interpretation:
The noble gas needs to be identified from the given options.
Concept introduction:
Noble gases are inactive gases or inert gases. The outer-electron configuration of noble gases is
Answer to Problem 20STP
D. Argon is a noble gas.
Explanation of Solution
Reason for correct option:
D. Group zero or 18th group in the periodic table is known as periodic table. This group consists of seven elements; helium, neon, argon, krypton, xenon, radon and ununoctium. Thus, argon is a noble gas.
Reason for incorrect option:
- Sodium is present in group 1.
- Chromium is present in group 6.
- Boron is present in group 13.
- Chlorine is present in group 17.
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