Almost all other elements found in nature were made by various natural methods of nucleosynthesis.
Chemistry in its element: 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.
It was named in by Humphry Davy after the compound from which he isolated the metal, potash, or potassium hydroxide.
An extract from the s by the Dutch chemist Herman Boerhaave describes how potash got its name: It is prepared there from the Wood of green Fir, Pine, Oak, and the like, of which they make large piles in proper Trenches, and burn them till they are reduced to Ashes These ashes are then dissolved in boiling Water, and when the Liquor at top, which contains the Salt, is depurated, i.
This, then, is immediately put into large copper Pots, and is there boiled for the space of three days, by which means they procure the Salt they call Potas, which signifies Pot-Ashes on account of its being thus made in Pots.
Even earlier in the 16th Century, Conrad Gesner tells us that "Of the hearbe called Kali, doe certayne prepare a Salt" He describes this plant, Kali whose Latin name is Salsola kali but is more commonly known as Saltwort: However, it is from the herb kali, that we owe the word that describes both - al-kali or alkali; the 'al' prefix simply being Arabic definite article 'the'.
The crude potash can be made more caustic or 'pure' by treating a solution of it with lime water, calcium hydroxide. The potassium carbonate and calcium hydroxide solutions react with a bit of chemical partner-swapping: It was from this pure hydroxide that Davy first isolated the metal potassium.
To do this he used the relatively new force of electricity. After unsuccessfully trying to electrolyse aqueous solutions of potash, during which he only succeeded in breaking apart the water, he reasoned that he needed to do away with the water and try to electrolyse molten potassium hydroxide.
This he did on the sixth of October, using the large Voltaic pile he had built at the Royal Institute in London. His younger cousin, Edmund Davy, was assisting Humphry at the time and he relates how when Humphry first saw "the minute globules of potassium burst through the crust of potash, and take fire as they entered the atmosphere, he could not contain his joy".
Davy had every right to be delighted with this amazing new metal: This meant the metal would float on water --at least, it would do if it didn't explode as soon as it came into contact with the water. Potassium is so reactiveit will even react and burn a hole through ice.
This was the first alkali metal to be isolated, but Davy went on to isolate sodium, calcium, magnesium and barium. Whilst Davy named his new metal potassium after the potash, Berzelius, the Swedish chemist who invented the international system of chemical symbols now used by chemists the world over, preferred the name kalium for the metal, better reflecting its true origins, he thought.
Hence it is due a small salty herb that we now end up with the symbol K for the element pot-ash-ium, potassium. 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.
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.Potassium is an element in the alkali group of metals with an atomic symbol K, atomic number 19, and atomic weight It is the chief cation in the intracellular fluid of muscle and other cells.
The exact chemical composition of potassium and sodium compounds, and the status as chemical element of potassium and sodium, was not known then, and thus Antoine Lavoisier did not include the alkali in his list of chemical elements in Pronunciation: /pəˈtæsiəm/ (pə-TAS-ee-əm).
Hair Analysis. Hair is a site of excretion for essential, nonessential and potentially toxic elements. In general, the amount of an element that is irreversibly incorporated into growing hair is proportional to the level of the element in other body tissues.
An element is a chemical substance made up of a particular kind of atom and hence cannot be broken down or transformed by a chemical reaction into a different element, though it can be transmuted into another element through a nuclear caninariojana.com is so, because all of the atoms in a sample of an element have the same number of protons, .
A chemical element is a species of atoms having the same number of protons in their atomic nuclei (that is, the same atomic number, or Z). For example, the atomic number of oxygen is 8, so the element oxygen consists of all atoms which have exactly 8 protons.
Potassium nitrate has a chemical formula of KNO3. It is an ionic salt of potassium ions K+ and nitrate ions NO3− and is, therefore, an alkali metal nitrate. It is a natural source of nitrate and has been used as a constituent for several different purposes, including food preservatives, fertilizers, tree stump removal, rocket propellants, and fireworks.