- 4n series is called as "Thorium" series.
- 4n+1 series is called as "Neptunium" series.
- 4n+2 series is called as "Uranium" series
- 4n+3 series is called as "Actinium" series
- X-rays & 𝛾-rays of same energies are distinguished by their frequencies
- Spin of Pions (π-mesons) is zero.
- Mass of a Proton is 1.0072766 amu
- Mass of a Neutron is 1.0086654 amu
- The total quantum number 'n' specified "Energy" quantization.
- The azimuthal quantum number specified "Angular Momentum".
- The magnetic moment of proton is given by 2.8eħ/2mp
- The magnetic moment of Neutron is given by 1.9eħ/2mp.
- In Davisson-Germer experiment , the angle between incident beam and diffracted beam is called "co-lattitude".
- In heavy atoms the spin-orbit interaction is almost equal to "electrostatic interaction".
- L-S coupling is due to "electrostatic interaction".
- L-S coupling scheme breaks down in strong magnetic field and applies to light atoms.
- In light atoms, "orbit interaction" is less than "electrostatic interaction".
- According to shell model nucleons interact primarily with a general force field rather than directly with one another.
- Magic numbers: 2,8,20,28,50,82,126
- Debroglie wavelength associated with electron accelerated to a potential V is ƛ=12.26/√V A⁰