Heavy metals are here treated as light metals and, in general, are not further considered. The heaviness of naturally occurring metals such as gold, copper, and iron may have been noticed in prehistory and, in light of their malleability, led to the first attempts to craft metal ornaments, tools, and weapons. All metals discovered from then until 1809 had relatively high densities; their heaviness was regarded as a singularly distinguishing criterion. From 1809 onwards, light metals such as sodium, potassium, and strontium were isolated. Their low densities challenged conventional wisdom and it was proposed to refer to them as "metalloids" (meaning "resembling
Russel Metals three business segments: metals service centres, energy products, and steel distributors. As of 2017, 49% of revenue was from the service centres, 39% was from energy products, and the rest was from steel distribution. It has sites in both Canada and the United States, with most sites located in Canada, and derives roughly 30 per cent of its revenues from the United States. Russel Metals Russel Metals Inc. is a Canadian public metals distribution and processing company. It is one of North America's largest metal distribution companies, with operations across Canada and the United States. The company was originally established