What are the periods and group in a periodic table ? Give two characteristic of each.
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.