Question

How can l state the period to which the elements belong

Answer 1

Answer:

Principal Quantum Number

Explanation:

n is the principal quantum number or number of shells. It represents the number of periods to which an element belongs to. Thus, n=1 represents first period, n=2 represents second period and n=3 represents third period. Hence periodic table is arranged on the basis of the electronic configuration of elements.

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Answer 2

Answer:

To find the position (group & period) of element in Periodic table and identify its properties. (Except Transition elements)

The period of element relates the number of shells of an atom of the given element.

The group is similar to the no of valence electrons of given element.