Sigma bond is stronger than pi bond, Because sigma bond is formed from the overlapping between the hybrid orbitals together or with the atomic orbitals by head, while pi bond is formed from the...
The modern periodic table consists of 7 periods (horizontal rows), and 18 groups (vertical columns), The elements are arranged ascendingly according to their atomic numbers and the way to fill their atomic energy sublevels...
The mathematical solution of Schrodinger’s equation introduced four numbers that were called quantum numbers, to determine the energy of an electron in multi-electron atoms, we should know the four quantum numbers which describe it.
