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List of chemical elements. 118 chemical elements have been identified and named officially by IUPAC. A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [1]
A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by chemical bonds. A molecule consisting of atoms of only one element is therefore not a compound. A compound can be transformed into a different substance by a chemical ...
A chemical element is a chemical substance that cannot be broken down into other substances by chemical reactions. The basic particle that constitutes a chemical element is the atom. Elements are identified by the number of protons in their nucleus, [1] known as the element's atomic number. [2] For example, oxygen has an atomic number of 8 ...
Aluminium diboride – AlB 2 [9] [10] Aluminium bromide – AlBr 3 [11] Aluminium carbide – Al 4 C 3 [12] Aluminium iodide – AlI 3 [13] Aluminium nitride – AlN [14]
Inorganic compounds by element. List of alloys. List of alkanes. List of elements by name. List of minerals – List of minerals with Wikipedia articles. List of alchemical substances. Polyatomic ion – Ion containing two or more atoms. Exotic molecules – Atoms composed of exotic particles can form compounds.
Palladium compounds (2 C, 34 P) Phosphorus compounds (13 C, 39 P) Platinum compounds (5 C, 18 P) Plutonium compounds (2 C, 13 P) Polonium compounds (1 C, 16 P) Potassium compounds (3 C, 176 P) Praseodymium compounds (1 C, 13 P) Promethium compounds (16 P) Protactinium compounds (1 C, 11 P)
A chemical substance is a unique form of matter with constant chemical composition and characteristic properties. [1][2] Chemical substances may take the form of a single element or chemical compounds. If two or more chemical substances can be combined without reacting, they may form a chemical mixture. [3]
For example, the compound LiBr is made of Li + cations and Br − anions; thus, it is called lithium bromide. The compound BaO, which is composed of Ba 2+ cations and O 2− anions, is referred to as barium oxide. The oxidation state of each element is unambiguous. When these ions combine into a type-I binary compound, their equal-but-opposite ...