Chemical elements questions This is a list of recently added questions about chemical elements. Chemical elements quiz What can be used to extinguish magnesium fires? Fire blanket 180 Dry sand 1129 Water 59 CO2 Extinguisher 268 The water, fire blanket and carbon dioxide fire extinguisher cannot be used for extinguishing magnesium fires. Burning magnesium is usually quenched by using a Class D dry chemical fire extinguisher, or by covering the fire with sand to remove its air source. ShadowMaster Share and bring new players to the game! 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question chem.libretexts.org 4 Very interesting! Fire questions how many groups and periods does the modern periodic table have 6 periods and 14 groups 299 7 periods and 18 groups 1147 8 periods and 19 groups 722 9 periods and 20 groups 222 The modern periodic table of the elements contains 18 groups, or vertical columns. Elements in a group have similar chemical and physical properties because they have the same number of outer electrons. The periodic table consists of seven periods. The periods vary in length. M Share and bring new players to the game! 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question genesismission.jpl.nasa.gov 2 Very interesting! Science questions The rarest chemical element naturally ocurring in the Earth's crust is... rhenium 534 iridium 533 osmium 763 astatine 1110 Astatine is a radioactive chemical element with symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. The total amount of astatine in the Earth's crust is estimated to be less than one gram at any given time. synapsaa Share and bring new players to the game! 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question wikipedia → Astatine 3 Very interesting! Records questions Which element is blue in liquid state? hydrogen 724 nitrogen 1267 oxygen 2223 helium 897 Liquid oxygen has a pale blue color and is strongly paramagnetic. The first measurable quantity of liquid oxygen was produced by Polish professors Zygmunt Wróblewski and Karol Olszewski (Jagiellonian University in Kraków) on April 5, 1883. Ts Share and bring new players to the game! 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question wikipedia → Liquid oxygen 0 Very interesting! Chemistry questions Which of these elements is not a micronutrient? Mn 524 Zn 710 Tl 3352 Cu 1083 Copper, zinc and manganese are micronutrients. They are necessary for the proper functioning of our body. Thallium, on the other hand, is very toxic. Ts Share and bring new players to the game! 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question wikipedia → Micronutrient 1 Very interesting! Metals questions Which of the following metals is the most reactive? sodium 1229 potassium 764 rubidium 751 cesium 1754 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. Ts Share and bring new players to the game! 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question wikipedia → Caesium 3 Very interesting! Metals questions What is the half-time of radiocarbon? (carbon-14) 5 years 1031 57 years 2455 573 years 2851 5730 years 5626 Carbon-14, 14C, or radiocarbon, is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons. Carbon-12 and carbon-13 are both stable, while the half-life of carbon-14 is 5,730 ±40 years. Ts Share and bring new players to the game! 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question wikipedia → Carbon-14 3 Very interesting! Geology questions What is the name of the most radioactive isotope on the planet? Rad 226 338 Uranus 235 886 Polonium 210 738 plutonium 244 581 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. Ts Share and bring new players to the game! 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question wikipedia → Polonium 6 Very interesting! Isotopes questions What is the chemical symbol of mercury? Ru 481 Rh 1009 Hg 8573 Mt 142 The Latin name of mercury is "hydrargyrum" (meaning liquid silver - quicksilver), hence the symbol Hg. Ru is the chemical symbol of ruthenium, Rh - rhodium, Mt - meitnerium. globalquiz.org Share and bring new players to the game! 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question 0 Very interesting! Chemistry questions What is the chemical symbol of manganese? Mg 1418 Mo 138 Mn 7435 Ma 533 Mg is the chemical symbol of magnesium. Mo is the chemical symbol of molybdenum. globalquiz.org Share and bring new players to the game! 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question 0 Very interesting! Chemistry questions --> Play and see more questions Chemical elements quiz
