Top 10 metals factsChemistry quiz
How big was the biggest gold nugget?
235 kg. The largest nugget was found in Australia in 1872. It weighed 7555.42 Oz (235 kg) and was 1.42 m long.
What is steel made of?
Iron and coal. Carbon steel, composed simply of iron and carbon, accounts for 90% of steel production. Low alloy steel is alloyed with other elements, usually molybdenum, manganese, chromium, or nickel, in amounts of up to 10% by weight to improve the hardenability of thick sections.
When and where was the idea of gold, silver and bronze medals for sport event competitors introduced?
1904 Summer Olympics, St. Louis. The choice of metals comes from the first three Ages of Man in Greek mythology: the Golden Age, when men lived among the gods; the Silver age, where youth lasted a hundred years; and the Bronze Age, the era of heroes.
What material are church bells made of?
Bronze. The traditional metal for church bells is a bronze of about 23% tin. Steel was tried during the busy church-building period of mid-19th-century England, for its economy over bronze, but was found not to be durable.
Which naturally occurring chemical element is the densest?
Osmium. The density of osmium is 22,570 kg/m3, slightly more than Iridium (22,420) and platinum (21,450). Commonly used metals are considerably less dense - the density of iron is 7,870, lead 11,340 and mercury 13,456.
Which of these elements is not a precious metal?
Lanthanum is a chemical element with symbol La . It is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. Lanthanum does not belong to precious metals.
Which metal has the highest reflectivity and thermal conductivity?
Silver is a chemical element with symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal.
What is brass composed of?
Copper and zinc. Brass is us used for musical instruments such as horns and bells for its acoustic properties and high malleability. One type of brass, called Prince's metal (75% copper, 25% zinc), is used as an imitation of gold due to its beautiful yellow color.