Chemistry

Quantum number is the number that gives the idea of orientation, position and the idea about how the electron is orbiting. According to Quantum mechanics, 4 number of quantum number is required. Principle quantum number Azimuthal quantum number Magnetic quantum number Spin quantum number Principle Quantum number: Principle quantum number indicates in which energy state the electron is belongs to. It indicates the orbits and what number of electron will be in principle energy state. The number of electron in 4th energy state will be equal to 2n.n that is

 Ionization energy is rquired energy to remove one electron from outermost electronic shell from one mole of atom or ion in gaseous state.