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Uranium is notable for the extremely high density of its metallic form: at 19.1 grams per cubic centimetre (0.69 lb/cu in), uranium is 68.4% more dense than lead. Depleted uranium, which has about the same density as natural uranium, is used when this high density is desirable but the higher radioactivity of natural uranium is not.
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Depleted uranium consists mainly of 238 U which decays by alpha decay with a half-life of 4.468(3) × 10 9 years. Even if the uranium contained 235 U which decays with a similar half-life of about 7.038 × 10 8 years , both of them would still be regarded as weak alpha emitters and their radioactivity is only hazardous with direct contact or ...
This is an extended version of the energy density table from the main ... Uranium-235 fissile isotope ... Lithium Thionyl Chloride (LiSOCl2) [14] 2.5: Water 220.64 ...
Uranyl nitrate is a water-soluble yellow uranium salt with the formula UO 2 (NO 3) 2 · n H 2 O. The hexa-, tri-, and dihydrates are known. [3] The compound is mainly of interest because it is an intermediate in the preparation of nuclear fuels. In the nuclear industry, it is commonly referred to as yellow salt.
In general, uranium salts exhibit nephrotoxicity. Normal commercial stocks from depleted uranium have typical specific activity 0.37–0.51 microcuries per gram (14–19 kBq/g), too weak to harm from outside the body. [8] However, uranyl acetate is very toxic if ingested, inhaled as dust, or absorbed through cut or abraded skin. [citation needed]
The anhydrous material can be obtained by the reaction of oxygen with uranium tetrachloride: UCl 4 + O 2 → UO 2 Cl 2 + Cl 2. In terms of structures, all three of these compounds feature the uranyl center (trans-UO 2 2+) bound to five additional ligands, which can include (bridging) chloride, water, or another uranyl oxygen. [4] [5]
Uranium(III) chloride is a green crystalline solid at room temperature. UCl 3 melts at 837 °C and boils at 1657 °C. Uranium(III) chloride has a density of 5500 kg/m 3 or 5.500 g/cm 3. Its composition by weight: Chlorine: 30.84% Uranium: 69.16%. Its formal oxidative states: Chlorine: −1 Uranium: +3