Using the Periodic Table above that means any compound that contains an element shown in orange will contain ionic (electrovalent) bonds. Compounds that form between two non-metals (or between non-metals and metalloids) will contain covalent bonds. Using the Periodic Table above that means any compound that contains element shown in yellow or green will contain covalent bonds.
Porpoises are a group of fully aquatic marine mammals, that are sometimes referred to as mereswine, all of which are classified under the family Phocoenidae, parvorder Odontoceti (toothed whales). There are 8 extant species of porpoise.
Meaning: Any of several small gregarious cetacean mammals having a blunt snout and many teeth. Classified under: Nouns denoting animals. Hypernyms (porpoise is a kind of...): dolphin (any of various small toothed whales with a beaklike snout; larger than porpoises) Hyponyms (each of the following is a kind of porpoise): harbor porpoise; herring hog; Phocaena phocaena (the common porpoise of the northern Atlantic and Pacific)