Metals questions This is a list of recently added questions about metals. Which metal is resistant to all acids?Tantalum. Noble metals such as gold, platinium and palladium can be dissolved in aqua regia, a highly concentrated mixture of hydrochloric acid and nitric acid. Silver is soluble in pure nitric acid. Ruthenium can be dissolved in aqua regia only when in the presence of oxygen, while rhodium must be in a fine pulverized form. Niobium and tantalum are resistant to all acids, including aqua regia.Created by: Sumit Tamangchemical elements riddles »hard 51% GoldGold555SilverSilver137PlatiniumPlatinium1029TantalumTantalum1841 If a gun bullet was made of gold, what properties would it have?Armor-piercing. The density of gold is 19,320 kg/m3, which is higher than of uranium (18,800) and much higher than of lead (11,340). The armor-piercing ammo is made of uranium for its high density - golden bullets would work for this purpose even better.Created by: Cleoguns riddles »very hard 37% it would be uselessit would be useless1584explosiveexplosive326armor-piercingarmor-piercing2043similar in its properties to a lead bulletsimilar in its properties to a lead bullet1494 Which naturally occuring 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.Created by: globalquiz.orgchemistry riddles »hard 51% heliumhelium234leadlead1267osmiumosmium2547platinumplatinum934 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.Created by: globalquiz.orgalloys riddles »easy 71% cast ironcast iron530coppercopper738bronzebronze3533ceramicsceramics142 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.Created by: KasiaOlympic Games riddles »average 61% 10th century BC, Ancient Greece10th century BC, Ancient Greece12823rd century AD, Ancient Rome3rd century AD, Ancient Rome10231904 Summer Olympics, St. Louis1904 Summer Olympics, St. Louis50211936 Summer Olympics, Berlin1936 Summer Olympics, Berlin817 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.Created by: Kasiamusical instruments riddles »hard 40% copper and ironcopper and iron1226copper and tincopper and tin2640copper and zinccopper and zinc3052copper and leadcopper and lead694 Play chemistry quiz and see all the questions.