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Top 10 chemical elements facts

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Chemical elements quiz
Which chemical element forms compounds which are typically intensely colored?
Chromium. The name of chromium means colour in Greek. Its compounds are used as pigments, including chrome yellow which had been used to paint school buses and chromium oxides used as a green color in glassmaking. Natural rubies are colored red due to chromium ions.
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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.
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Which element is blue in liquid state?
Oxygen. 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.
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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.
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isotopes facts
Which naturally occurring 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.
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metals facts
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Where was scandium chemical element discovered?
In Sweden. Scandium was discovered in 1879 by Lars Fredrik Nilson at the Uppsala University. He named it from the Latin word Scandia meaning "Scandinavia"
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Sweden facts
Which chemical element was discovered in Russia?
Ruthenium was discovered in 1844 by the Baltic German scientist Karl Ernst Claus at the Kazan State University. He named it after Ruthenia, the Latin word for Rus.
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discoveries facts
What is the half-time of radiocarbon? (carbon-14)
5730 years. 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.
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geology facts
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.
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The rarest chemical element naturally ocurring in the Earth's crust is...
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.
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