There are two elements in the first period, hydrogen and helium.
7th period.
Period 1: 2 elements Period 2: 8 elements Period 3: 8 elements Period 4: 18 elements Period 5: 18 elements Period 6: 32 elements Period 7: 25 elements
There are 8 elements in the third period of periodic table. The elements belong to group-1,2,13,14,15,16,17 and 18
All of these elements belong to same period. The period number is 3.
The elements Ba (Barium) and Ca (Calcium) belong to the same group on the periodic table, as they both belong to Group 2 (alkaline earth metals). They do not belong to the same period, as Barium is in period 6 and Calcium is in period 4.
There are 2 elements in the first period, 8, 8 elements in 2nd and 3rd periods respectively,
Group 3, period 4 in the Mendeleev periodic table of the elements.
There are 8 transition metals. Elements from V to Cu belong to this.
There are 8 transition metals. Elements from V to Cu belong to this.
There are 8 transition metals. Elements from V to Cu belong to this.
All of these elements are present in period-2. They have 2 shells.
Two elements