Түгээмэл тархацтай ашигт малтмалын хуримтлал-хромын хүдрийн …
The nature of chromium Chromium, element symbol Cr, atomic number 24, relative atomic mass 51.996, belongs to the transition metal element of group VIB of the periodic table of chemical elements. Chromium metal is body-centered cubic crystal, silver-white, density 7.1g/cm³, melting point 18...