Question

distinguish between shells and sub shell

Answer 1

Answer:

In an atom, a shell is a collection of subshells with the same principle quantum number, n . ... Subshells are collections of orbitals which share the same principle quantum number and angular momentum quantum number, l , which is denoted by the letters s , p , d , f , g , h , and so on.

Answer 2

Electron shells consist of one or more subshells, and subshells consist of one or more atomic orbitals. Electrons in the same subshell have the same energy, while electrons in different shells or subshells have different energies.