Answer :

In the periodic table, the horizontal rows of elements are called periods and the vertical rows of elements are called groups.

Characteristics of a Period:


i) Elements have consecutive atomic numbers.


ii) Number of elements in period is fixed a andhe maximum number of electrons which can be accommodated in various shells.


Characteristics of a Group:


i) Elements do not have consecutive atomic numbers.


ii) All elements have similar electronic configuration and show similar properties.


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