Question

among 2p and 3s which is fillrd first and why ?​

Answer 1

Answer:

2p is filled first. According to the holding capacity of different orbitals the sequence of filling the difference orbitals is, 1s 2s 2p 3s 3d and on and on....To find this series Azimuthal quantum number helps...... As it tells about the orbital.

I hope it help.....