exclusion principle

Pauli's Exclusion Principle - According to this principle, an orbital can accommodate maximum of two electrons and these two must have opposite spins. This means that an orbital can have 0, 1 or 2 electrons. Moreover, if an orbital has two electrons, they must be of op..

The Paulis exclusion principle states, that no two electrons in an atom can have the same values of all the four quantum numbers. If one electron in the atom has the quantum numbers n = 1, l = 0, m = 0 and s = +1/2, no other electron can have the same four quantum numbers. In o..

According to this principle, an orbital can accommodate maximum of two electrons and these two must have opposite spins. This means that an orbital can have 0, 1 or 2 electrons. Moreover, if an orbital has two electrons, they must be of opposite spi..

This principle was proposed by Pauli in 1952. It states that no two electrons in an atom can have same values for all the four quantum numbers. Thus, in the same atom, two electrons may have the same values for three quantum numbers but the fourth must be different. Electrons havi..

No two atoms can have the same quantum state. Hence, all electrons have discrete energy states. If there are 'n' orbits, then there are 2n possible energy levels which are splitting and creating a band of energy (electrons possessing a range of energy level..

The following rules are followed for filling up molecular orbitals with electrons in order to write molecular configurations: 1. The molecular orbital having the lowest energy is filled first. This is in accordance with Aufbau principle as already discussed for atoms. 2. Each molecular or..

It is formed by the combination of two hydrogen atoms. Each hydrogen atom has one electron in 1s-orbital and, therefore, there are two electrons in hydrogen molecule. Both these electrons are to be accommodated in the lowest energy molecular orbital. According to Pauli's exclusion h..

fig 1.6 - Energy level diagram for a multi-electron atom The energy level diagram for a multi-electron atom is as shown above. The filling of orbitals is governed by the following rules: 1) Aufbau principle 2) Pauli's exclusion principle 3) Hund's rule of maximum multi..

Hydrogen Molecule (H 2 ) - It is formed by the combination of two hydrogen atoms. Each hydrogen atom has one electron in 1s-orbital and, therefore, there are two electrons in hydrogen molecule. Both these electrons are to be accommodated in the lowest energy molecular orbital. According to Pauli's ..