Metacognition is  cognition about cognition, thinking about thinking, or knowing about knowing. It comes from the root word  meta , meaning beyond. It can take many forms; it includes knowledge about when and how to use particular strategies for learning or for problem solving. There are generally two components of metacognition: knowledge about cognition, and regulation of cognition.
In chemistry, an ionic compound is a chemical compound in which ions are held together in a structure by electrostatic forces termed ionic bonds.The positively charged ions are called cations and the negatively charged ions are called anions.onic compounds without the acidic hydrogen ion (H +), or the basic ions hydroxide (OH â) or oxide (O 2â), are also known as salts and can be formed by acid-base reactions. Ionic compounds containing hydrogen ions are classified as acids and compounds containing hydroxide or oxide ions are classified as bases.
Adapted from McMurry/Fay, section 2.10, p. 56 -63 and the 1411 Lab Manual, p. 27 -31. TYPES OF COMPOUNDS. Ionic compounds are compounds composed of ions, charged particles that form when an atom. (or group of atoms) gains or loses electrons. (A cation is a positively charged ion; an anion is a. negatively charged ion.) Covalent ormolecular compounds form when elementsshare. electrons in a covalent bond to form molecules. Molecular compounds are elec trically neutral.