Elements questions This is a list of recently added questions about elements. Play elements quiz and see all the questions. Which chemical elements did Maria Curie discover?Radium and polonium. Marie Curie was a Polish and naturalized-French physicist and chemist who conducted pioneering research on radioactivity (a term that she coined). Among her many achievements was the discovery of two elements, polonium and radium.Created by: Ninjaivery easy 97% radium and poloniumradium and polonium3437lead and mercurylead and mercury72bromine and bismuthbromine and bismuth23gadolinium and holmiumgadolinium and holmium8discoveries riddles » What was the first chemical element to be artificially produced?Technetium. Many of technetium's properties were predicted by Dmitri Mendeleev, who left a gap in his periodic table before the element was discovered. It was finally discovered by Emilio Segrè and Carlo Perrier in 1937 and named after the Greek word τεχνητός, meaning "artificial", since it was the first element to be artificially produced.Created by: Ninjaivery hard 39% promethiumpromethium35actiniumactinium56technetiumtechnetium97plutoniumplutonium57chemistry riddles » Which of these metals is a precious metal?Silver. A precious metal is a rare, naturally occurring metallic chemical element of high economic value.They are usually ductile and have a high lustre. Historically, precious metals were important as currency but are now regarded mainly as investment and industrial commodities. Gold, silver, platinum, and palladium each have an ISO 4217 currency code. Created by: Tschukaeasy 75% CalciumCalcium40IronIron57SilverSilver1065TantalumTantalum240chemistry riddles » How else are the biophilic elements called?Nutrients. A nutrient is a component in foods that is used by an organism to survive and grow. Macronutrients are broken down and converted into the energy needed by an organism's metabolic system to function. Micronutrients provide the necessary cofactors for metabolism to be carried out; they are also used to build and repair tissues and regulate body processes.Created by: Tschukavery hard 39% NutrientsNutrients513EndokryptneEndokryptne267CryptomorphicCryptomorphic301BasicBasic208biology riddles » How many hydrogen isotopes occur naturally on the Earth?Three isotopes of hydrogen occur naturally on the Earth: the most frequent protium (1H), deuterium (2H) and tritium (3H). Other isotopes of hydrogen (4H-7H) were created in laboratories and are highly unstable.Created by: Paweł Kołodziejczykhard 58% oneone2419twotwo3850threethree10465fourfour1055names riddles » Which of the following countries doesn't have its "own" element?Italy. Polonium was discovered by Maria Skłodowska-Curie in 1898 and named in honour of Poland. Germanium was named by the German chemist Clemens Winkler. Francium was named by the French chemist and the physicist Marguerite Perey. Created by: Paweł Kołodziejczykaverage 69% PolandPoland677GermanyGermany973ItalyItaly5922FranceFrance900chemistry riddles » Which chemical element has been named after the Sun?Helium was first discovered in 1868 as the unexpected line in the spectrum of the chromosphere of the Sun - and so it was named after the Greek word Helios (Sun).Created by: Shankar Kumareasy 70% GoldGold3307HeliumHelium11442OxygenOxygen309PhosphorusPhosphorus1226Sun riddles » What makes depleted uranium a good material for making ammunition?High density. Depleted uranium is 1.67 times as dense as lead, 84% as dense as osmium or iridium, which are the densest known substances under standard (i.e., Earth-surface) pressures. Consequently a depleted uranium projectile of given mass has a smaller diameter than an equivalent lead projectile, with less aerodynamic drag and deeper (armor-piercing) penetration due to a higher pressure at point of impact.Created by: globalquiz.orghard 45% radioactivityradioactivity1910high densityhigh density9285explosivenessexplosiveness4038extreme hardnessextreme hardness5374nuclear power riddles » This is an iron buoy. Where were its atoms formed?In a high-mass star preceding Sun. Radioactive nickel-56 (which decays to the most common isotope of iron) is the last element to be produced before the collapse of a supernova. That is why the iron was abundantly scattered into space after the supernova explosion.Created by: life-o-holicvery hard 34% in a high-mass star preceding Sunin a high-mass star preceding Sun5216in the Sunin the Sun1271in the Earth's corein the Earth's core4384in the Earth's crustin the Earth's crust4242physics riddles » What is the most common element (by mass) forming the planet Earth?Iron is most abundant in the Earth's outer and inner core, and it is the fourth most common element in the Earth's crust.Created by: globalquiz.orgvery hard 29% carboncarbon2687oxygenoxygen1973ironiron2784siliconsilicon1931Earth riddles » Play chemistry quiz and see all the questions.