A) 10
B) 8
C) 32
D) 18
Correct Answer: D
Solution :
Horizontal rows of periodic table are called periods. Modem periodic table has seven periods.I period | ? | 2 elements |
II period | ? | 8 elements |
III period | ? | 8 elements |
IV period | ? | 18 elements |
V period | ? | 18 elements |
VI period | ? | 32 elements |
VII period | Incomplete |
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