(n,adj-no) chemical element/(P)
(n) chemical symbol (i.e. H for hydrogen, O for oxygen, etc.)
(n) (obsc) periodic table of the elements
(n) (obsc) periodic law
(n) rare element
(n) transition element/transition metal
(n) isotope
(n) metallic element
(n) the four classical chemical elements (fire, earth, air and water)
(n) synthetic element/artificial element (i.e. technetium)
(n) a trace element
(n) transuranium element/transuranic element/super heavy element
(n) rare earth elements
(n) nitrogen group (group 15 of the periodic table)
(n) a nonmetallic element
(n) platinum group metals/platinum group elements
(n) radioactive element
(n) transuranium element/transuranic element/super heavy element
(n) halogen family elements
