Structure of At...

spin quantum number with two spin states of the electron represented by two arrows, ↑ (spin up) and ↓ (spin down) was introduced to account for

According to quantum mechanics ψ² the wave function squared gives

Due to the presence of electrons in the inner shells, the electron in the outer shell will not experience the full positive charge of the nucleus (Z_e). This is known as

The Aufbau principle states : In the ground state of the atoms, the orbitals are filled in order of

According to Pauli’s exclusion principle

Daltons atomic theory could not explain one of the following

Oil drop experiment is for determining the

How many neutrons and protons are there in the  ¹³₆C nucleus?

Cathode rays are discharged under one of the following conditions:

One of the following scientists was the first to discover electron