Question

Why are there no P blocks in period 1?

Answer 1

1. The modern periodic table consists of $118$ elements that are arranged according to their atomic masses.
2. The table consists of different blocks such as s, p, d, and f.
3. The elements are arranged in different blocks according to the filling of electrons.
4. The P-block elements start with columns 3A to 8A.
5. Only two elements are present in the first period i.e. Hydrogen and Helium.
6. The atomic number of Hydrogen is 1 and it is a s-block element.
7. The atomic number of Helium is 2 and it is a s-block element.
8. Hence there is no P-block present in period 1.