The group of elements on the periodic table that almost never react are the noble gases.

Here's why:

* Full Valence Shells: Noble gases have a full outer shell of electrons (8 electrons, except for Helium which has 2). This makes them extremely stable and unreactive.

* No Need to Gain or Lose Electrons: They don't need to gain or lose electrons to achieve a stable configuration, unlike other elements.

* Very Weak Interatomic Forces: They have very weak interatomic forces, making them exist as gases at room temperature and hard to bond with other elements.

Examples of noble gases include Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn).