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What is the Number of Elements is : (A) 1st Period, and (B) 3rd Period, the Modern Periodic Table? - Science

 What is the number of elements is 1st period the modern periodic table?

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Solution

The number of elements in  1st period is 2 in the modern periodic table.

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Lakhmir Singh Class 10 Chemistry (Science)
Chapter 5 Periodic Classification Of Elements
Q 29.2 | Page 304
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