Manganese easy to oxidize. Manganese metal and its common ions are paramagnetic. Manganese tarnishes slowly in air and oxidizes ("rusts") like iron in water containing dissolved oxygen. Naturally occurring manganese is composed of one stable isotope, Mn. Eighteen radioisotopes have been isolated and described, ranging in atomic weight from 46 u (Mn) to 65 u (Mn). The most stable are Mn with a half-life of 3.7 million years, Mn with a half-life of 312.3 days, and Mn with a half-life of 5.591 days. All of the remaining radioactive isotopes have half-lives of less than three hours, and the majority of less
Manganese Mines Mines Wildlife Management Area, a conservation area. The main industry is now farming. The name of this community derives from the discovery and mining of manganese here, beginning in the 1880s and ending in the 1890s. Also, Lafarge Canada operated a limestone quarry at Manganese Mines which closed in 1996. The limestone was used to produce cement. Manganese Mines Manganese Mines is an unincorporated community in Colchester County, Nova Scotia, Canada. This community is located about six miles north-east of Truro, between the South Branch North River and the Salmon River. The land was previously part of Onslow Township. It