The number of elements in 5th and 6th period of periodic table are respectively

The number of elements in the 4th period of periodic table is

The number of elements in the 4th period of periodic table is

The number of elements in the fifth period of periodic table is

If each orbital can hold a maximum of 3-electrons. The number of elements in 4^(th) period of periodic table is :

Total number of elements in 6th period are:

Number of elements present in 5th period is

The total number of elements in period 3 of the periodic table is: