Question

What will happen when an electron of phosphorus Atom changes it’s position from L-shell to M-shell ? Explain

Answer 1

Each of those colored balls is an electron. In an atom, the electrons spin around the center, also called the nucleus. ... Once one shell is full, the next electron that is added has to move to the next shell. So... for the element of PHOSPHORUS, you already know that the atomic number tells you the number of electrons.