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% GoldGold634SilverSilver154PlatiniumPlatinium1162TantalumTantalum2080 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 useless1705explosiveexplosive343armor-piercingarmor-piercing2238similar in its properties to a lead bulletsimilar in its properties to a lead bullet1632 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% heliumhelium254leadlead1358osmiumosmium2740platinumplatinum1009 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 iron557coppercopper785bronzebronze3755ceramicsceramics149 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 62% 10th century BC, Ancient Greece10th century BC, Ancient Greece13573rd century AD, Ancient Rome3rd century AD, Ancient Rome10801904 Summer Olympics, St. Louis1904 Summer Olympics, St. Louis54571936 Summer Olympics, Berlin1936 Summer Olympics, Berlin856 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 »very hard 39% copper and ironcopper and iron1278copper and tincopper and tin2739copper and zinccopper and zinc3147copper and leadcopper and lead720 Play chemistry quiz and see all the questions.