Physics, asked by krrish30, 1 year ago

what is the number of elements in the first period and third period of the Morden periodic table

Answers

Answered by Vikramkumat

5

in first 7 and in third 7

Answered by sarita1942

8

Answer:

in the first period there are 2 elements. they are hydrogen and helium.....

in the third period there are 8 elements.....

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