Iron, a metal, is the 26th element on the periodic table. Its atomic weight is 55.845, and it exists as a solid at room temperature. Iron melts at 2,800 degrees Fahrenheit and boils at 5,182 F. In its pure state, iron ha... More »

A chemical property is a characteristic associated with a substance or reaction that is observable as it chemically changes or transforms into another substance. This chemical change produces a product that has a differe... More » Science Chemistry Atoms & Molecules

The chemical formula of iron (II) sulfide is FeS. Because iron sulfide is a chemical compound made from iron bonded to sulfur, the chemical formula is made from a combination of their chemical symbols from the periodic t... More »

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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 »

An element's metallic properties refer to its propensity to behave like the elements that are classified as metals in the periodic table. This depends on the set of chemical properties commonly associated with the metall... More »

A nonmetal element in chemistry is an element that does not possess the properties of metals, and is found in the groups 14, 15 and 16 of the periodic table. Unlike metals, nonmetals are poor conductors and typically hav... More »

The modern periodic table is based upon the atomic number and the physical properties of each element. The periods, or rows, are arranged by increasing atomic number. Each column, or group, of elements has similar physic... More »