is a specific kind of: substance.

is a broader term that covers: allotrope | transuranic element | argonon, inert gas, noble gas | metal, metallic element | nonmetal | transactinide | Ac, actinium, atomic number 89 | Ar, argon, atomic number 18 | arsenic, As, atomic number 33 | astatine, At, atomic number 85 | atomic number 107, Bh, bohrium, element 107 | atomic number 5, B, boron | atomic number 35, Br, bromine | atomic number 6, C, carbon | atomic number 17, chlorine, Cl | atomic number 110, darmstadtium, Ds, element 110 | atomic number 105, Db, dubnium, element 105, hahnium | atomic number 9, F, fluorine | atomic number 32, Ge, germanium | atomic number 108, element 108, hassium, Hs | atomic number 2, He, helium | atomic number 1, H, hydrogen | atomic number 53, I, iodin, iodine | atomic number 36, Kr, krypton | atomic number 103, lawrencium, Lr | atomic number 109, element 109, meitnerium, Mt | atomic number 101, Md, mendelevium, Mv | atomic number 10, Ne, neon | atomic number 7, N, nitrogen | atomic number 102, No, nobelium | atomic number 8, O, oxygen | atomic number 15, P, phosphorus | atomic number 94, plutonium, Pu | atomic number 86, radon, Rn | atomic number 111, element 111, Rg, roentgenium | atomic number 104, element 104, Rf, rutherfordium, unnilquadium, Unq | atomic number 106, element 106, seaborgium, Sg | atomic number 34, Se, selenium | atomic number 14, Si, silicon | atomic number 16, S, sulfur, sulphur | atomic number 52, Te, tellurium | atomic number 112, element 112, ununbium, Uub | atomic number 116, element 116, ununhexium, Uuh | atomic number 115, element 115, ununpentium, Uup | atomic number 114, element 114, ununquadium, Uuq | atomic number 113, element 113, ununtrium, Uut | atomic number 54, Xe, xenon | trace element ... show more.

has as a part: atom.