The trivalent hydroxides are too weak bases390 to form stable salts with so weak an acid as carbonic acid.
Antimony acts as a trivalent element in the formation of a chloride.
The trivalent metals, which in addition to aluminium include also iron and chromium, are sometimes called the earth metals.
Similarly, a trivalent atom, such as that of Nitrogen, can unite with three monovalent atoms.
It can also act as a trivalent metal, and in this condition forms salts similar to those of aluminium.
Triatomic, trī-a-tom′ik, adj. consisting of three atoms: trivalent.
Similarly, we have trivalent, tetravalent, pentavalent elements.
Thus the oxide of the trivalent metal aluminium has the formula Al2O3.
Write the general formula of an alum, representing an atom of an alkali metal by X and an atom of a trivalent metal by Y.
But if a divalent atom is in question the charge carried is double, and, similarly, a trivalent atom carries a triple charge.
trivalent tri·va·lent (trī-vā'lənt)
Having valence 3.