PENTAD n.
Any element, atom, or radical, having a valence of five, or which can be combined with, substituted for, or compared with, five atoms of hydrogen or other monad; as, nitrogen is a pentad in the ammonium compounds.
PHOSPHORIC a.
s. -- Soluble phosphoric acid, Insoluble phosphoric acid (Agric. Chem.), phosphoric acid combined in acid salts, or in neutral or basic salts, which are respectively soluble and insoluble in water or in plant juices. -- Reverted phosphoric acid (Agric. Chem.), phosphoric acid changed from acid (soluble) salts back to…
POTASSIUM n.
An Alkali element, occurring abundantly but always combined, as in the chloride, sulphate, carbonate, or silicate, in the minerals sylvite, kainite, orthoclase, muscovite, etc. Atomic weight 39.0. Symbol K (Kalium).