organic compound in which halogen atoms have been substituted for hydrogen atoms in an alkane

any compound of carbon and another element or a radical

a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely

a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water)