King chemistry, ing molecule metung yang electrically neutral a grupu da reng e kukulang kareng aduang atom a maki ustung tatag (sufficiently stable) king partikular a pangaayus a pibubuklud da reng aduang tutung masikan a chemical bond. Maliari ya muring mangabaldugan a unit da reng adua o maigit pang atom a pibubuklud da reng covalent bond.[1][2] King organic chemistry ampong biochemistry, e makanian kaigpit ing pamangamit king katayang molecule, at magagamit ya murin iti kareng charged a organic molecule ampong biomolecule. Makikilala la reng molecule kareng polyatomic ion king maigpit a kabaldugan a iti.
Linto ya ing kabaldugan a iti aniang miragdagan ing beluan tungkul king pangabalangkas (structure) da reng molecule. E la makaing eksaktu deng minunang kabaldugan kareng molecule antimong pekamalating lkapirasu (particle) ning purung sangkap a chemical (chemical substance) nung nu atiu pa murin ing komposisiun ampong kaurian a chemical.[3] Maralas mikakaprublema king kabaldugan a iti, uling king aldo-aldong bie, dakal la reng sangkap (substance), antimo deng batu (rocks), asin (salts), ampong metal, bibilugan da lang atom o ion, oneng e la gawa kareng molecule.
King kinetic theory da reng gases, ing katayang molecule maralas yang magagamit king sanumang butil a gas, nanu man ing kayang sangkap o komposisiun.[4] Agpang king kabaldugan a iti, tuturing da la mu namang molecule deng noble gases, lipat ning bibilugan no ning metung a atom a alang bond.