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(near r.t.) 6.0 g/cm 3: 24 Cr chromium; use: ... (near r.t.) 7.26 g/cm 3: ... 0.17443 g/cm 3 (from 22.947 cm 3 /mole; ...
Chromium compounds are compounds containing the element chromium (Cr). Chromium is a member of group 6 of the transition metals. The +3 and +6 states occur most commonly within chromium compounds, followed by +2; charges of +1, +4 and +5 for chromium are rare, but do nevertheless occasionally exist. [3] [4]
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This is a list of prices of chemical elements.Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison.
Chrome alum or Chromium(III) potassium sulfate is the potassium double sulfate of chromium. Its chemical formula is KCr(SO 4 ) 2 and it is commonly found in its dodecahydrate form as KCr(SO 4 ) 2 ·12(H 2 O).
Chromium triiodide is prepared by the direct reaction of chromium metal with an excess of iodine.The reaction is conducted at 500 °C: 2 Cr + 3 I 2 → 2 CrI 3. To obtain high purity samples, the product is thermally decomposed at 700 °C to sublime out chromium(II) iodide.
The anhydrous form of chromium(II) acetate, and also related chromium(II) carboxylates, can be prepared from chromocene: 4 RCO 2 H + 2 Cr(C 5 H 5) 2 → Cr 2 (O 2 CR) 4 + 4 C 5 H 6. This method provides anhydrous derivatives in a straightforward manner. [8] Because it is so easily prepared, Cr 2 (OAc) 4 (H 2 O) 2 is a
Atomicity is the total number of atoms present in a molecule of an element. For example, each molecule of oxygen (O 2) is composed of two oxygen atoms.Therefore, the atomicity of oxygen is 2.