Find the total number of `6^(th)` period elements from the given atomic numbers? `81,63,80,50,54,48,86`

Find the total number of 6^(th) period elements from the given atomic numbers? 81,63,50,54,48,86

The total number of p-bock elements among the given atomic numbers 50, 80, 42, 64, 86, 32 is

Find the number of p-block elements from the following atomic numbers given below. {:(83,79,42,64,37,54,34):}

Total number of elements in 6th period are:

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

The elements with atomic numbers 39 to 48 belong to