Chemistrymedium · Past Paper
Which period of the periodic table contains only two elements?
APeriod 1
BPeriod 2
CPeriod 3
DPeriod 4
✓ Correct Answer: A — Period 1
Period 1 contains only Hydrogen and Helium.
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✓ Correct Answer: A — Period 1
Period 1 contains only Hydrogen and Helium.
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