The formula for an oxide ion is O2-, which shows that it is an anion. An oxide is a compound formed by the combination of oxygen and another element. Oxygen can form many different oxide compounds with both metals and no... More »

Oxides that act as acids as well as bases in a chemical reaction are called amphoteric oxides. Many metallic oxides exhibit properties of both acids and bases. Oxides of metals are able to receive or donate a proton or H... More »

Tin(II) oxide is compound made of one atom of tin and one atom of oxygen, as represented by the chemical formula SnO. It appears as either a blue-black solid or a red solid, depending on the production method. More » Science Chemistry Atoms & Molecules

CuSO4, also known as copper(II) sulfate, is an inorganic compound made by combining a copper ion with a charge of positive two and a sulfate anion with a charge of negative two. CuSO4 is used as a fungicide, pesticide an... More »

The difference between a cation and an anion is that a cation is an ion with a positive charge, and an anion is an ion with a negative charge. Ions occur because many atoms, though their charge is zero, have electrons th... More »

A cation is an ion that has a positive charge, while an anion is an ion that has a negative charge. When an atom or molecule has no charge, it is referred to as being neutrally charged. More » Science Chemistry Atoms & Molecules

The most common ion that oxygen can form is the oxide ion. In this form, a single oxygen atom gains an electrical charge of negative 2 and can readily bond with most other elements to form an oxidized compound. More »