atomic number 42

Thesaurus

Noun

1.atomic number 42 - a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steelmolybdenum, Mometal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.molybdenite - a mineral resembling graphite that is valued as the chief source of molybdenum and its compounds