10 most difficult chemical elements riddles A list of ten (out of 46) chemical elements related questions that are the most often answered incorrectly Chemical elements quiz What is the name of the most radioactive isotope on the planet?Polonium 210. 210Po is extremely toxic, with one microgram being enough to kill the average adult (250,000 times more toxic than hydrogen cyanide by weight).210Po was used to kill Russian dissident and ex-FSB officer Alexander V. Litvinenko in 2006,very hard 19% Rad 226Rad 22614%Uranus 235Uranus 23543%Polonium 210Polonium 21019%plutonium 244plutonium 24422%Created by: Tschuka . Statistics based on 446 answers in 2 languages »physics riddles » Which chemical element has the symbol Sb?Antimony. Sb is the chemical symbol of antimony, from stibium, the Latin name for "black antimony". Si stands for silicon, Sg - seaborgium, Sn - tin.very hard 35% siliconsilicon10%seaborgiumseaborgium44%antimonyantimony35%tintin10%Created by: globalquiz.org. Statistics based on 5853 answers in 2 languages »chemistry riddles » Which letter is not used as a symbol of chemical element?T. U is the chemical symbol of uranium, V - vanadium, W - tungsten.very hard 37% TT37%UU16%VV25%WW19%Created by: globalquiz.org. Statistics based on 3745 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 39% sodiumsodium27%potassiumpotassium15%rubidiumrubidium17%cesiumcesium39%Created by: Tschuka . Statistics based on 397 answers in 2 languages »metals riddles » What is the chemical symbol of plutonium?Pu. P is the chemical symbol of phosphorus, Pt - platinum, Po - polonium.hard 44% PP7%PuPu44%PtPt43%PoPo4%Created by: globalquiz.org. Statistics based on 4804 answers in 2 languages »chemistry 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 15281 answers in 2 languages »gold riddles » Which of the following is not a chemical element?Darwinium. Roentgenium, copernicum and einsteinium are chemical elements. There is no such thing like a darwinium.hard 45% roentgeniumroentgenium16%darwiniumdarwinium45%copernicumcopernicum26%einsteiniumeinsteinium12%Created by: globalquiz.org. Statistics based on 4774 answers in 2 languages »scientists riddles » What gave the name to the indium chemical element?Indigo dye. In 1863, the German chemists Ferdinand Reich and Hieronymous Theodor Richter found a blue line in the spectrum of tested minerals. As no element was known with a bright blue emission, they concluded a new element was present, and they named it from the indigo color in its spectrum.hard 46% country of Indiacountry of India17%city of Indianapoliscity of Indianapolis10%Indigo dyeIndigo dye46%its chemical indifferenceits chemical indifference25%Created by: Luca Biaggi. Statistics based on 11904 answers in 2 languages »India riddles » What is the chemical symbol of radon?Rn. Ra is the chemical symbol of radium. Rh is the chemical symbol of rhodium.hard 46% RR6%RnRn46%RaRa41%RhRh5%Created by: globalquiz.org. Statistics based on 5687 answers in 2 languages »chemistry 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 48% heliumhelium4%leadlead26%osmiumosmium48%platinumplatinum19%Created by: globalquiz.org. Statistics based on 11592 answers in 2 languages »chemistry riddles » Play chemical elements quiz and see all the questions.