xenon, rubidium, krypton, pyrolytic, vaporisation, cryostat, calcium oxide, fluorine, helium, anneal, molecular sieve, nitriding, reactant, dioxide, dihydrogen, ceria, silicates, acetylene, boron trifluoride, pentane, hydride, calcite, nitric, gases, cerium, potassium hydroxide, martensite, clathrate, sulfur, carbonic acid, amine, radioactive decay, diethyl ether, deuterium, paraffins, desorption, ionisation, zns, erbium, aluminum oxide, cementite, sorption, halide, combustor, water vapor, carbonyl, silicic acid, adsorption, oxidation, aqueous, dopant, zirconium oxide, potassium carbonate, absorption coefficient, cyclohexane, hydrogen chloride, zirconium, ammoniac, cadmium sulfide, ablator, formamide, superfluid, alkali metal, cyanogen, enthalpy, nitrogen, exciton, mgo, magnesium hydroxide, hydroxides, germanium, olivine, hexadecane, carbonization, calcium sulphate, interstellar medium, electrodeposition, ionization, kelvin, sulfur dioxide, calcium fluoride, paramagnetic, alkane, emittance, photometer, calcium carbonate, vapor, supersolid, fluxes, chemisorption, titanium oxide, aqueous solution, pentoxide, torr, viscosity, pearlite, fermion, magnetic flux, ferrite, refractive index, toroid, photolysis, hydrogen, bromine, neon, chlorine, gas, steam, condensate, mercury, n2, oxygen, uranium, ammonia, coke, methane, pulsed, ar, laser, isotopic, sr, hyperbaric, radiometric, chronometric, co2, neutron, nonisothermal, pb, photon

disappointingly, john william strutt, lord rayleigh, monatomic, potassium-argon dating, rayleigh, third baron rayleigh

chemical element, element

atomic number 18