chromium chemical as in the periodic table

alphabet alphabets atom atomic atoms backdrop background brittle cancerous caner carcinogenic character characters chemical chemist chemistry chemists chrome chromium computer corrode corrosion earth education electron electrons electroplate electroplating element environment environmental free generated graphics gray green grey hazard hazardous hexavalent illustration isolated lab laboratories laboratory letter letters luminous material materials metal molecule molecules oxidation oxidize periodic polish polished research resistant rohs rust rusty school science solid state structure study table tarnish tarnishing trivalent white