There are 18 elements in period 4.
These are the periods 4 and 5.
there are 32 elements in period 6.
Period 4 and period 5 of the periodic table have the same number of elements. There are 18 elements in each period. While some elements in period 4 are calcium, iron, and zinc, elements in period 5 are tin, antimony, and iodine.
The periodic table of Mendeleev has 18 groups and 7 periods.
18
There are 18 periods in the periodic table. The periods are divided according to the chemical properties of elements. Elements in a group have similar properties.
4
There are 4 elements in group-4.
There are 2 elements in the first period, 8, 8 elements in 2nd and 3rd periods respectively,
Same periods as the ones next to them (ie. 4-7). Called 'transition metals', has no group number.
there are 7 periods in the periodic table118
Those are the metals.