acceptor account for acid actinides activated complex adjacent alcohol group aldehyde alkaline-earth metal alkene alkyne alloy alteration aluminum amide amine ammonia amorphous anion anode aqueous solution aromatic hydrocarbon ash astatine atmospheric pressure axial ban barium base bead benzene beryllium beverage bicarbonate binary biomedical bitter bloodstream blue vitriol bombard bond angle boron branched chain bromine bubble butane butanoic acid calculation calorie carbohydrate carbonated beverage carbon dioxide carbon carboxyl group cathode cation charge chemical bond chloride chlorine cholesterol chromium cluster coal coefficient collide collision colloid composition compressibility concentration concrete condensation polymer conductivity conductor configuration conjugate conserve constituent contour convection convenient copolymer copper core corrosion cough syrup crystalline current cyanide cyclic compound dazzling degree Fahrenheit density derivative detectable deviate diagram diamine diatomic diene diffusion dimensional disperse dissociate distillation distribute diver donor double bond durable dye elastic elastomer electrolyte electron electroplate endothermic equatorial equilibrium equivalence ethylamine evolve exothermic fashion favor feather ferment fertilizer filament flammable fluoride fluorine fragrance friction fur gaseous gasoline generator geometry gold gradation gram grayish group halogen harsh helium hexane homogenous hydrolysis identical illuminate indestructible inhale initial insoluble intensity intermediate iodine ion isolate isomerism joule ketone krypton limestone lipid macromolecule magnet marble mass mathematically mechanism mercury metal methane methylamine minus modification molecule monomer mustard mutual negative neon neutron nucleon octahedron octene octet odorless offset opaque orbiting orbit organism orientation outermost overlap overwhelm oxidation oxidizable oxygen ozone paleontologist parenthesis particular pendulum penetrate perpendicular periodic table petroleum philosopher philosophical phosphor photosynthesis picogram planar plasma platinum polar pollutant polyatomic polyester polyethylene polymerization postulate potential predict prefix prior process product propane proportion protein proton quantitative radiation radical radioactive radioisotope radon reactant region remarkable removal repel representative repulsion retention rim saponification semiconductor sewage silicon silver simplify soapy soluble solution solvent sour specify specimen stabilize stable stir stress subatomic sublimation subscript substituent sucrose sulfur superscript suspension symbol synchronously tetrahedron texture thrive tin torr transfer tungsten twist underneath uniqueness unsaturated urea valence variety velocity vigorously vinegar volt wavelength xenon