Arsenic gets its name from a Persian word for the yellow pigment now known as orpiment. For keen lexicographers apparently the Persian word in question Zarnikh was subsequently borrowed by the Greeks for their word arsenikon which means masculine or potent. On the pigment front, Napoleon's wallpaper just before his death is reported to have incorporated a so called Scheele's green which exuded an arsenic vapour when it got damp. So potent or not, licking the wallpaper in Napoleon's apartments is definitely off the menu.
That's Bea Perks who will be with us next time to tell us the deadly tale of arsenic, I hope you can join us. I'm Chris Smith, thank you for listening and goodbye. Chemistry in its element is brought to you by the Royal Society of Chemistry and produced by thenakedscientists.
There's more information and other episodes of Chemistry in its element on our website at chemistryworld.
Click here to view videos about Potassium. View videos about. Help Text. Learn Chemistry : Your single route to hundreds of free-to-access chemistry teaching resources. We hope that you enjoy your visit to this Site. We welcome your feedback. Data W. Haynes, ed. Version 1. Coursey, D. Schwab, J. Tsai, and R. Dragoset, Atomic Weights and Isotopic Compositions version 4.
Periodic Table of Videos , accessed December Podcasts Produced by The Naked Scientists. Download our free Periodic Table app for mobile phones and tablets. Explore all elements. D Dysprosium Dubnium Darmstadtium.
E Europium Erbium Einsteinium. F Fluorine Francium Fermium Flerovium. G Gallium Germanium Gadolinium Gold. I Iron Indium Iodine Iridium. K Krypton. O Oxygen Osmium Oganesson. U Uranium. V Vanadium. X Xenon. Y Yttrium Ytterbium. Z Zinc Zirconium. Membership Become a member Connect with others Supporting individuals Supporting organisations Manage my membership. Facebook Twitter LinkedIn Youtube. Discovery date. Discovered by. Origin of the name. The name is derived from the English word 'potash'.
Melting point. Boiling point. Atomic number. Relative atomic mass. Key isotopes. Electron configuration. CAS number. ChemSpider ID. ChemSpider is a free chemical structure database. Electronegativity Pauling scale. Common oxidation states. Atomic mass. Half life. Mode of decay. Relative supply risk. Crustal abundance ppm. Top 3 producers. Top 3 reserve holders.
Political stability of top producer. Political stability of top reserve holder. Young's modulus GPa. Shear modulus GPa. Bulk modulus GPa. Vapour pressure. Temperature K. Pressure Pa. Listen to Potassium Podcast. Transcript : Chemistry in its element: potassium Promo You're listening to Chemistry in its element brought to you by Chemistry World , the magazine of the Royal Society of Chemistry. End promo Chris Smith Hello, this week the story of the first alkaline metal ever isolated, why it's an alkaline metal at all and why its symbol begins with the letter K.
Peter Wothers Potassium - the only element named after a cooking utensil. An extract from the s by the Dutch chemist Herman Boerhaave describes how potash got its name: "Potas or Pot-ashes is brought yearly by the Merchant's Ships in great abundance from Coerland now part of Latvia and Lithuania , Russia, and Poland.
Chris Smith Cambridge chemist Peter Wothers. Next time beautiful but deadly is the name of the game. Bea Perks Arsenic gets its name from a Persian word for the yellow pigment now known as orpiment. Chris Smith So potent or not, licking the wallpaper in Napoleon's apartments is definitely off the menu. Promo Chemistry in its element is brought to you by the Royal Society of Chemistry and produced by thenakedscientists. Similar to sodium, potassium is critical to all living things, for the same reasons i.
The potassium ion is used extensively in intercellular fluids. Potassium plays an important role in the growth of plants. A naturally occurring radioactive isotope of potassium, K40, is believed to be a major cause of mutation in the evolution of life.
Bananas are a good natural source of dietary potassium. Most potassium is obtained from evaporite salt deposits containing sylvite potassium chloride. It is also obtained from the minerals alunite and carnallite. A little potassium chloride goes into pharmaceuticals, medical drips and saline injections. Other potassium salts are used in baking, photography and tanning leather, and to make iodize salts.
In all cases it is the negative anion, not the potassium, which is the key to their use. Most potassium occurs in the Earth's crust as minerals, such as feldspars and clays. Potassium is leached from these by weathering, which explains why there is quite a lot of this element in the sea 0.
Minerals mined for their potassium are pinkish and sylvite, carnallite and alunite. The main mining area used to be Germany, which had a monopoly of potassium before the first World War.
The world production of potassim ores is about 50 million tonnes, and reserves are vast more than 10 billion tonnes. Potassium is a key plant element. Although it is soluble in water, little is lost from undisturbed soils because as it is released from dead plants and animal excrements, it quickly become strongly bound to clay particles, and it is retained ready to be readsorbed by the roots of other plants. Potassium can be found in vegetables, fruit, potatoes, meat, bread, milk and nuts.
It plays an important role in the physical fluid system of humans and it assists nerve functions. When our kidneys are somehow malfunctioning an accumulation of potassium will consist. This can lead to disturbing heartbeats.
0コメント