Periods in the periodic table of elements

Periods in the Periodic table of elements

Hello everyone!  I hope you all would have heard about the periodic table of elements. It is a table which contains elements. It totally contains 118 elements. The periodic table of elements has periods and groups. Today we are going to learn about the periods in the periodic table of elements.

Periods

•  There are 7 types of periods.

1. First period

2. Second period

3. Third period

4. Forth period

5. Fifth period

6. Sixth period

7. Seventh period

First period

The first period contains only 2 elements Hydrogen and Helium. So, it is called the “shortest period”.

Second period

The second period contains 8 elements. Which are Li, Be, B, C, O, F, Ne. The second period is called as "Short Period".

Third period

The third period contains 8 elements. Which are Na, Mg, Al, Si, P, S, Cl, Ar. The third period is known as "Short period".

Fourth Period

The fourth period contains 18 elements. Elements from K to Kr, from elements 19 - 36. The fourth period is called as the "Long Period".

Fifth Period

The fifth period contains 18 elements. Which are from Rb to Xe. From 37 - 54 elements. The fifth period is called as the "Long Period".

Sixth Period

The sixth period contains 32 elements. Which are from Cs to Rn. From 55 - 86. The sixth period is called as the "Longest Period".

Seventh Period

The seventh period contains 31 elements. The seventh period is an incomplete period.

Thank you!