Microsoft Word - WaterChemistry

301 At one time, DuPont produced ultra-pure silicon by reacting silicon tetrachloride with high- purity zinc vapors at 950 °C, p ...

302 by four oxygen atoms that bridge to other silicon atoms to form a three dimensional lattice. Silica is soluble in water at h ...

303 Tellurium- Metalloid Tellurium is a chemical element with symbol Te and atomic number 52. A brittle, mildly toxic, rare, sil ...

304 Isotopes Naturally occurring tellurium has eight isotopes. Five of those isotopes,^122 Te,^123 Te,^124 Te, (^125) Te and (^1 ...

305 In contrast to selenium, tellurium is not in general able to replace sulfur in its minerals, due to the large difference in ...

306 Compounds Tellurium belongs to the same chemical family as oxygen, sulfur, selenium and polonium: the chalcogen family. Tell ...

307 true oxides of tellurium in the +6 oxidation state, but a mixture of Te4+, OH− and O−2. Tellurium also exhibits mixed-valenc ...

308 when the new metal was heated, the red color which the metal imparts to sulfuric acid, and the black precipitate which this ...

309 Other Uses  Used to color ceramics.  The strong increase in optical refraction upon the addition of selenides and tellurid ...

310 ...

311 Allotropes Section Allotropy or allotropism is the property of some chemical elements to exist in two or more different form ...

312 Cerium, left, Dysprosium, right. Examples of allotropes include: Non-metals Element Allotropes Carbon  Diamond - an extreme ...

313 Metalloids Element Allotropes Boron:  Amorphous boron - brown powder - B 12 regular icosahedra  α-rhombohedral boron  β-r ...

314 Element Allotropes Tin:  grey tin (alpha tin)  white tin (beta tin)  rhombic tin (gamma tin)  sigma tin Iron:  ferrite ...

315 Allotropes Described Section Aluminum- Post-transition Metal Aluminum is ordinarily classified as a metal, given its luster, ...

316 Aluminum sulfate reacts with sodium bicarbonate to which foam stabilizer has been added, producing carbon dioxide for fire-e ...

317 Calcium- Post-Transition Metal Calcium is the chemical element with symbol Ca and atomic number 20. Calcium is a soft gray a ...

318 Calcium salts are colorless from any contribution of the calcium, and ionic solutions of calcium (Ca2+) are colorless as wel ...

319 Isotopes Calcium has four stable isotopes (^40 Ca,^42 Ca,^43 Ca and^44 Ca), plus two more isotopes (^46 Ca and^48 Ca) that h ...

320 Because of this relationship, calcium isotopic measurements of urine or blood may be useful in the early detection of metabo ...