Sets of chemical elements

any of the fifteen lanthanides plus scandium and yttrium

a set of elements in the periodic table of elements, defined by shape of an orbital—s, p, d, or f—where the valence electron lies

loosely defined subset of elements that exhibit metallic properties

grouping of chemical elements

element whose atomic number is greater than 92

six noble, precious metallic elements clustered together in the periodic table: ruthenium, rhodium, palladium, osmium, iridium, and platinum

chemical elements with atomic numbers from 104 to 120

metal of relatively low density

set of chemical elements in the s- and p-blocks

metal that is found in its metallic form, either pure or as an alloy, in nature

one of the 22 chemical elements that is found naturally on Earth essentially as a single nuclide (which may, or may not, be a stable nuclide)

one of 26 chemical elements which have only a single stable isotope (nuclide)

molecule consisting of one element. Molecular form of elements containing two or more atoms.

category of substances

molecule consisting of multiple chemical element; molecules composed of more than one type of element

chemical series