The most striking similarities shared by the 24 elements in question are that they are all metals and that most of them are hard, strong, and lustrous, have high melting and boiling poin… See more

As noted earlier, the electrons associated with an atomic nucleus are localized, or … See more

To understand the electron configurations of other atoms, it is customary to employ the Aufbau (German: “building up”) principle, the basis of which is that, to achieve a … See more

If two atoms are close together, some of their orbitals may overlap and participate in the formation of molecular orbitals. Electrons that occupy a molecular orbital interact wit… See more