Question

What is periods what the correlation of a period number with the element of that period

Answer 1

periods are horizontal rows in a periodic table.
period number indicates the number of shells in the elements
hope it helps you dear.

Answer 2

Seven horizontal rows of elements arranged in increasing order of atomic number is called a period.

The correlation of is that the atoms of different elements which have the same number of occupied shell are placed in the same period.

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