what is the first rare earth metal?
91317
It must be Scandium (Sc, 21)
1102500
Magnesium and zinc are heavy metals , Gold is light , It does not corrode and is shiny too.It is malleable and Ductile !\nGold has several qualities that have made it exceptionally valuable throughout history. It is attractive in colour and brightness, durable to the point of virtual indestructibility, highly malleable, and usually found in nature in a comparatively pure form. \nSoft, lustrous, white silver was one of the first metals known to humans. Together with gold, iridium, palladium, and platinum, it is one of the group called precious metals. Silver ornaments and decorations have been found in royal tombs dating back as far as 4000 BC.Silver is somewhat harder than gold and is second only to gold in malleability and ductility.\nSame is with silver\nRegards,\nSidra
833585
Rutherfordium, Rhenium, Rhodium, Ruthenium...ahh Rubies...take your pick.
530449
Lutetium is a silvery white corrosion-resistant trivalent metal that is relatively stable in air and is the heaviest and hardest of the rare earth elements. Lutetium has the highest spin quantum number of the elements, at 7.\n\nThis element is very expensive to obtain in useful quantities and therefore it has very few commercial uses. However, stable lutetium can be used as catalysts in petroleum cracking in refineries and can also be used in alkylation, hydrogenation, and polymerization applications.\n\nLutetium aluminum garnet (Al5Lu3O12) has been proposed for use as a lens material in high refractive index immersion lithography.\n\nFound with almost all other rare-earth metals but never by itself, lutetium is very difficult to separate from other elements and is the least abundant of all naturally occurring elements. Consequently, it is also one of the most expensive metals, costing about six times as much per gram as gold.
755403
this should help\n\nhttp://en.wikipedia.org/wiki/Dysprosium
593271
Osmium and Iridium are the two most dense elements in pure form. They are also very pretty metals, iridium particularly. Unlike osmium, iridium does not tarnish in air, and is in fact impervious to many forms of chemical attack, much like platinum. An alloy of 90% platinum and 10% iridium is widely used in both the jewelry and chemical industries, because it is strong, hard, beautiful, and impervious to almost all chemicals even at very high temperatures.\n\nWhich is the most dense element, osmium or iridium? That honor has changed hands a couple of times over the years.
623434
It was discovered in 1817.  It was found associated with Tellurium.  During this time it was found in minerals such as crooksite and clausthalite.
219766
Iron = Transition Metal\nCobalt = Transition Metal\nSodium = Metal (oddly enough)\nOxygen = Nonmetal (gas)\nHelium = Nonmetal (noble gas)
804787
Possibly. The only metals that are ferromagnetic are iron, nickel, and cobalt. Selenium is a completely different element, so if it's pure selenium, it won't show up. \n\nHowever, the aztecs probably didn't have pure selenium - it likely contained some iron. So it would show up.
905120
Actually, Technetium was discovered in platinum ore from Colombia in 1932 using x-ray spectroscopy by Walter Noddack and Ida Tacke in Berlin.  Emilio Segrè and Carlo Perrier out of Berkeley produced it artifically in 1937. Technetium is used for radiometric body imaging in the medical field.
955424
Almost certainly copper, which can be found as the native metal, and in ores which are so easily smelted that they could have been discovered accidentally.  Wikipedia suggests 7500 BC, compared to 4000 BC for silver and gold, and noticeably later for iron.\n\nYou could get an argument from somebody about carbon, because charcoal was being used for painting and decorating caves at least 30,000 years ago, and it's not got a lot of impurities compared with pure carbon.
517835
you mean ferrum it is nothing but the latin name of iron.\n\nIron is the most abundant metal on Earth, and is believed to be the tenth most abundant element in the universe. Iron is also the second most abundant element by mass, making up 34% of the mass of the Earth; the concentration of iron in the various layers of the Earth ranges from high (how much is "high?") at the inner core to about 5% in the outer crust. It is possible the Earth's inner core consists of a single iron crystal, although it is more likely to be a mixture of iron and nickel. The large amount of iron in the Earth is thought to create its magnetic field (you mean to say this isn't known for sure?).\n\nIron is a metal extracted from iron ore, and is almost never found in the free elemental state. In order to obtain elemental iron, the impurities must be removed by chemical reduction. Iron is used in the production of steel, an alloy or solid solution of different metals, and some non-metals, particularly carbon.\n\nNuclei of iron have some of the highest binding energies per nucleon, surpassed only by the nickel isotope 62Ni. The universally most abundant of the highly stable nucleides is, however, 56Fe. This is formed by nuclear fusion in the stars. Although a further tiny energy gain could be extracted by synthesizing 62Ni, conditions in stars are not right for this process to be favoured. When a very large star contracts at the end of its life, internal pressure and temperature rise, allowing the star to produce progressively heavier elements, despite these being less stable than the elements around mass number 60, known as the "iron group". This leads to a supernova.\n\nSome cosmological models with an open universe predict that there will be a phase where as a result of slow fusion and fission reactions, everything will become iron.
50991
In 1928, bacteriologist Alexander Fleming made a chance discovery from an already discarded, contaminated Petri dish. The mold that had contaminated the experiment turned out to contain a powerful antibiotic, penicillin.\n\nRadium was discovered in 1898 by French physicist and Nobel laureate Marie Curie in pitchblende (a uranium and radium-bearing mineral).
796792
Thallium (Greek θαλλός, thallos, meaning "a green shoot or twig") was discovered by Sir William Crookes in 1861 in England while he was making spectroscopic determinations for tellurium on residues from a sulfuric acid plant. The name comes from Thallium's bright green spectral emission lines. In 1862 Crookes and Claude-Auguste Lamy isolated the metal independently of each other.
463143
In 1869 when the periodic table first was created by Mendeleev.  The element was first isolated in 1774.
879268
Zinc is by far the best element. I also like plutonium.  It's just fun to say. "Plutonium."
579735
Guess a group 3 metal such as boron or Aluminium