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A period in periodic table has certain fixed number of elements. Which of the following matching is incorrect?

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1st period - 2 elements

2nd and 3rd periods - 8 elements

4th and 5th period - 18 elements

6th period -32 elements, but 7th period - 50 elements

answer is D.

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Detailed Solution

6th and 7th periods both have 32 elements each at the most.

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