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.
Harbor porpoises have a small, robust body with a short, blunt beak. Females are slightly larger than males. They have a medium-sized triangular dorsal fin. Their back is dark gray while their belly and throat are white. They have a dark gray chin patch and also intermediate shades of gray along their sides.