General chemistry

upright=1|thumb|right|Test tubes containing solutions of pH 1–10 colored with Universal indicator|an indicator

matter of constant composition best characterized by the entities (molecules, formula units, atoms) it is composed of and characterized by physical properties like density

In chemistry, an amphoteric compound () is a molecule or ion that can react both as an acid and as a base. What exactly this can mean depends on which definitions of acids and bases are being used.

method for describing the electronic structure of molecules using quantum mechanics

chemical reaction in which a substance combines with water

one of two foundational theories of quantum chemistry

exchange of ions between two electrolytes or between an electrolyte solution and a complex

molecule composed of only two atoms of the same or different chemical elements

In chemistry, an adduct (; alternatively, a contraction of "addition product") is a product of a direct addition of two or more distinct molecules, resulting in a single reaction product containing all atoms of all components. The resultant is considered a distinct molecular species. Examples include the addition of sodium bisulfite to an aldehyde to give a sulfonate. It can be considered as a single product resulting from the direct combination of different molecules which comprises all atoms of the reactant molecules.

crystallography

aspect of history

In chemistry, aminolysis (/am·i·nol·y·sis/) is any chemical reaction in which a molecule is lysed (split into two parts) by reacting with ammonia () or an amine. The case where the reaction involves ammonia may be more specifically referred to as ammonolysis.