Which of the following is NOT classified as a Noble
gas?
AHeliumCorrect AnswerIncorrect Answer
BNeonCorrect AnswerIncorrect Answer
CArgonCorrect AnswerIncorrect Answer
DHydrogenCorrect AnswerIncorrect Answer
Solution
Hydrogen, unlike Helium, Neon, and Argon, is not a Noble gas. Noble gases are characterized by their extremely low chemical reactivity and are found in Group 18 of the periodic table.
