Iron oxide, commonly known as rust, forms as iron corrodes in an oxygen environment. Iron is especially eager to bond with oxygen, which is why pure iron is rare on the earth's surface. Corrosion requires the presence of... More »

A common name for iron oxide is iron (III) oxide or rust. The chemical formula for this substance is Fe2O3. However, there are other compounds that consist of oxygen and iron, such as magnetite, which has the formula Fe3... More »

The chemical formula for iron (III) oxide is Fe2O3. This compound is also called hematite, iron ore and specularite. Hematite is a mineral naturally found on earth and appears as a gray or reddish compound. More »

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 »

Iron is a mineral and a vital nutrient for most animals. Because of its ability to form a bond with oxygen, iron is used by the hemoglobin in red blood cells to transport oxygen from the lungs or gills of an animal to th... More » Science Chemistry Atoms & Molecules

Iron exists in three configurations, or allotropes, at standard pressures. Each of these allotropes has a unique arrangement of atoms that influences the properties of the iron mass. More » Science Chemistry Atoms & Molecules

Iron is element number 26 on the periodic table. This means an iron atom contains 26 protons in its nucleus. Chemists refer to the number of protons in an atom's nucleus as that element's atomic number. More »