Which element is the lightest in the periodic table?
ALithium
BHelium
CBeryllium
DHydrogen
Explanation
• Hydrogen has one proton and one electron.
• It is the most abundant element in the universe.
• It exists primarily as a gas at standard temperature and pressure.
Exam Relevance
- Topic: Competitive Exams
- Subtopic: FPSC/PPSC Past Papers
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