Chemistry
Articles about matter, substances, reactions and chemical science.
Alkyne
Allergen
Allergen — substances that trigger allergic reactions
Allotropes of carbon
Allotropes of Carbon: Forms, Structure, and Uses
Allotropes of iron
Allotropes of iron: forms, structures, and importance
Allotropy
Alloy
Alloy — definition, types, production, history and common uses
Alnico
Alpha cleavage
Alpha cleavage (α-cleavage) in organic chemistry
Alum
Alum — the double sulfate salts (potassium aluminum sulfate and related compounds)
Alum refers to potassium aluminum sulfate and a family of double sulfate salts. This article explains composition, common types, history, practical uses, safety and how alums diffe
Aluminium
Aluminium (Al): properties, occurrence, production and uses
Aluminium (Al, atomic number 13) is a lightweight, corrosion-resistant metal and the most abundant metallic element in Earth’s crust. This article covers its properties, production
Aluminium antimonide
Aluminium arsenide
Aluminium chloride
Aluminium fluoride
Aluminium fluoride (AlF3)
Aluminium iodide
Aluminium oxide
Aluminium selenide
Aluminium sulfate
Aluminium sulfate (Al2(SO4)3): properties, production and uses
Amalgam
Amalgam: mercury alloys, formation, uses, and environmental issues
Americium
Amide
Amine
Amino acid
Amino acids are organic compounds that combine to form proteins; they have an amino and a carboxyl group plus a variable side chain and serve structural, metabolic, and signaling r
Ammonia
Ammonia (NH3): properties, production, uses, and safety
Ammonium
Ammonium (NH4+): formation, properties, uses and environmental role
Ammonium carbonate
Ammonium chlorate
Ammonium chloride
Ammonium dichromate
Ammonium nitrate
Ammonium perchlorate
Ammonium sulfate
Ammonium sulfide
Ammonium sulfide (NH4)2S
Amount of substance
Amount of substance (chemical amount)
Amount of substance (SI: mole) quantifies the number of specified elementary entities in a sample. This article explains its definition, relations, history, applications and key di
Amphibole
Amphibole — the double-chain inosilicate mineral group
Anabolic steroid
Analytical chemistry
Anion
Anions: Properties, Examples, and Their Role in Ionic Compounds
Antacid
Anthracite
Antihydrogen
Antihydrogen — the antimatter counterpart of hydrogen
Antiknock agent
Antimonide
Antimonide: chemistry, properties, and technological uses
Antimony
Antimony (Sb): properties, history, and uses
Antimony pentachloride
Antimony pentafluoride
Antimony pentafluoride (SbF5)
Antimony pentoxide
Antimony tetroxide
Antimony tetroxide (Sb2O4): properties, structure and uses