Chemistryhard · Past Paper
How many elements are present in the 4th period of the modern periodic table?
A8
B18
C32
D2
✓ Correct Answer: B — 18
The 4th period is the first long period and contains 18 elements.
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✓ Correct Answer: B — 18
The 4th period is the first long period and contains 18 elements.
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