, c. 1681, below.
Elias Ashmole (23 May 1617 – 18 May 1692 ), the celebrated English antiquary , was a politician , officer of arms , student of astrology and alchemy , and an early speculative Freemason . He supported the royalist side during the English Civil War , and at the more
Ammolite is a rare and valuable opal -like organic gemstone found primarily along the eastern slopes of the Rocky Mountains of the United States and Canada . It is made of the fossil ized shells of ammonite s, which in turn are composed primarily of aragonite , the same mineral that m more
Raney nickel () is a solid catalyst composed of fine grains of a nickel -aluminium alloy , used in many industrial processes. It was developed in 1926 by American engineer Murray Raney Raney, Murray (1927). "Method of producing Finely Divided Nickel ". US Patent 1628190, issued 19 more
| Electron affinity || -53 kJ/mol
Technetium () is the lightest chemical element with no stable isotope . It has atomic number 43 and is given the symbol Tc. The chemical properties of this silvery grey, crystalline transition metal are inte more
Sir Isaac Newton FRS () (4 January 1643 – 31 March 1727 ) [ OS : 25 December 1642 – 20 March 1727 ] was an English physicist , mathematician , astronomer , natural philosopher , and alchemist . His treatise Philosophiæ Naturalis Principia Mathematica , published in 1687, des more