Question

Explain how the elements can be classified into s p d and f blocks in brainly

Answer 1

The elements are classified into s,p,d and f blocks on the basis of their electronic configuration. It depends in which subshell the valence electron of the element is present.

For example,

Nitrogen(atomic number-7) has electronic configuration as:

1s2 2s2 2p3

since the valence electron is present in p subshell therefore it is placed in p-block.