Period 5 element with most production coming from the Xikuangshan Mine in Hunan. Antimony compounds are prominent additives for chlorine and bromine containing fire retardants found in many commercial and domestic products. The largest application for metallic antimony is as alloying material for lead and tin. It improves the properties of the alloys which are used as in solders, bullets and ball bearings. An emerging application is the use of antimony in microelectronics. Tellurium is a chemical element that has the symbol Te and atomic number 52. A brittle, mildly toxic, rare, silver-white metalloid which looks similar to tin, tellurium is chemically related
Power residue symbol Hilbert symbol formula_24 for the prime formula_4 by in the case formula_4 coprime to "n", where formula_28 is any uniformising element for the local field formula_29. The formula_14-th power symbol may be extended to take non-prime ideals or non-zero elements as its "denominator", in the same way that the Jacobi symbol extends the Legendre symbol. Any ideal formula_31 is the product of prime ideals, and in one way only: The formula_14-th power symbol is extended multiplicatively: For formula_35 then we define where formula_37 is the principal ideal generated by formula_38 Analogous to the quadratic Jacobi symbol, this symbol is multiplicative