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Standard VIII
Chemistry
No. of Elements in a Period
The long per...
Question

The long periods of the periodic table are

A
Period 7
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B
Period 4
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C
Period 3
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D
Period 5
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Solution

The correct options are
B Period 4
D Period 5
Period 4 and period 5 of the modern periodic table have the same number of elements in them. There are a total of 18 elements in each of them. These periods are known as long periods of the periodic table.

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No. of Elements in a Period
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