Chemistry
Grade-9
Easy
Question
Which of the following is a member of the 18th group?
- Hydrogen
- Helium
- Oxygen
- Carbon dioxide
Hint:
Noble gases are group 18 member.
The correct answer is: Helium
- Hydrogen is group 1 element.
- Helium is group 18 element.
- Oxygen is group 16 element.
- Carbon dioxide is not an element, it is a compound.
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