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There are two elements in the first period, hydrogen and helium.

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In what period do the elements in the actiniod series belong?

7th period.


How many elements in the first 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


How many elements are there in the third period of the periodic table?

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


Do the elements Na Mg Al Si P S Cl Ar have anything in common?

All of these elements belong to same period. The period number is 3.


Do the elements ba and ca belong to the same period or the same group on the periodic table?

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.


How many elements occur in each of the first three periods or the periodic table?

There are 2 elements in the first period, 8, 8 elements in 2nd and 3rd periods respectively,


What row does scandium belong to?

Group 3, period 4 in the Mendeleev periodic table of the elements.


How many transitions metals are there in period 3?

There are 8 transition metals. Elements from V to Cu belong to this.


How many transition metals are in period 3?

There are 8 transition metals. Elements from V to Cu belong to this.


How many transition metal in period 3?

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Where does beryllium boroncarbonnitrogenoxygenfluorine and neon belong in periodic table?

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The first period in the periodic table represents elements that possess only the first energy level s orbital therefore this period contains?

Two elements