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
SN 2005bc of the supernova at around −18.6 at maximum, rather faint for a Type Ia event. As the supernova was of Type Ia, its progenitor star was a White Dwarf star which exceeded the Chandrasekhar limit. Below is an image of SN 2005bc and NGC 5698 taken just over a week after peak brightness. SN 2005bc SN 2005bc was a Type Ia supernova occurring in the Barred spiral galaxy NGC 5698 in the constellation of Boötes. SN 2005bc was discovered on 2 April 2005 by LOSS and independently by Tim Puckett and L. Cox. The supernova was at magnitude 16.4 at