10 most difficult metals riddles A list of metals related questions that are most often answered incorrectly Chemistry quiz 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. very hard 28% GoldGold24%SilverSilver28%TinTin16%CopperCopper30%Created by: Tschuka. Statistics based on 2666 answers in 2 languages »science riddles » In welding terminology - what does acronym MIG stand for?Metal Inert Gas . MIG – ‘MIG’ stands for ‘Metal Inert Gas’ or ‘MAG’ (‘Metal Active Gas’ welding). This is one of the most common welding techniques – and one of the easiest to learn. MIG uses a consumable electrode and an argon-carbon dioxide shielding gas to create strong welds on both thin and thick sheets of metal. very hard 37% Metal Inactive Gas Metal Inactive Gas 29%Metal Inert Gas Metal Inert Gas 37%Metal Inter Gas Metal Inter Gas 22%Metal Inertly GasMetal Inertly Gas10%Created by: Tschuka. Statistics based on 286 answers in 2 languages »chemistry riddles » Which of the following metals is the most reactive?Cesium. Caesium or cesium is a chemical element with symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal . Is most reactive of all metals. very hard 38% sodiumsodium27%potassiumpotassium15%rubidiumrubidium18%cesiumcesium38%Created by: Tschuka. Statistics based on 467 answers in 2 languages »chemical elements riddles » 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.very hard 39% copper and ironcopper and iron16%copper and tincopper and tin35%copper and zinccopper and zinc39%copper and leadcopper and lead8%Created by: Kasia. Statistics based on 11731 answers in 2 languages »alloys riddles » What is the rarest metal in the Earth's crust?Rhenium is a chemical element with symbol Re It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust. Discovered in 1908, rhenium was the second-last stable element to be discovered. It was named after the river Rhine in Europe. hard 42% GoldGold8%RheniumRhenium42%PlatinumPlatinum27%ZirconiumZirconium21%Created by: Tschuka. Statistics based on 3927 answers in 3 languages »Earth riddles » How much did the biggest gold nugget weigh?235 kg. Record big nugget was found in Australia in 1872. It weighed 7555.42 oz that is 235 kg and measured 1.42 m.hard 44% 2,35 kg2,35 kg15%23,5 kg23,5 kg31%235 kg235 kg44%2350 kg2350 kg8%Created by: smyru. Statistics based on 5648 answers in 3 languages »gold riddles » 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.hard 45% it would be uselessit would be useless27%explosiveexplosive4%armor-piercingarmor-piercing45%similar in its properties to a lead bulletsimilar in its properties to a lead bullet22%Created by: Cleo. Statistics based on 15538 answers in 2 languages »guns riddles » 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.hard 49% heliumhelium4%leadlead26%osmiumosmium49%platinumplatinum19%Created by: globalquiz.org. Statistics based on 11801 answers in 2 languages »chemistry riddles » Brass is an alloy made of ...Zinc and copper. Brass is a metallic alloy that is made of copper and zinc. The proportions of zinc and copper can vary to create different types of brass alloys with varying mechanical and electrical properties.hard 59% nickel and coppernickel and copper7%zinc and copperzinc and copper59%bronze and copperbronze and copper29%brass is a chemical elementbrass is a chemical element3%Created by: Tschuka. Statistics based on 2444 answers in 3 languages »technical riddles » 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. average 60% PlatinumPlatinum4%RutheniumRuthenium29%SilverSilver5%LanthanumLanthanum60%Created by: Tschuka. Statistics based on 1488 answers in 3 languages »chemistry riddles » Play chemistry quiz and see all the questions.