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Group 6 element
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Group 6, numbered by IUPAC style, is a group of elements in the periodic table. Its members are chromium (Cr), molybdenum (Mo), tungsten (W), and seaborgium (Sg). These are all transition metals and chromium, molybdenum and tungsten are refractory metals.
Image: Chromium crystals and 1cm 3 cube
Image: Chromium crystals and 1cm 3 cube
Image: Molybdenum crystaline fragment and 1cm 3 cube
Image: Molybdenum crystaline fragment and 1cm 3 cube
Image: Wolfram evaporated crystals and 1cm 3 cube
Image: Wolfram evaporated crystals and 1cm 3 cube
The red colour of rubies is from a small amount of chromium(III).
The red colour of rubies is from a small amount of chromium(III).
Chromium
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Chromium is a chemical element; it has symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard, and brittle transition metal.
Chromium
Chromium
Sample of pure chromium metal
Sample of pure chromium metal
Chromium(II) carbide (Cr3C2)
Chromium(II) carbide (Cr3C2)
Anhydrous chromium(III) chloride (CrCl3)
Anhydrous chromium(III) chloride (CrCl3)