Search results
Results from the WOW.Com Content Network
Strontium is a chemical element; ... Strontium was first isolated as a metal in 1808 by Humphry Davy using the then newly discovered process of electrolysis.
Klaproth discovered uranium (1789) [6] and zirconium (1789). He was also involved in the discovery or co-discovery of titanium (1795), strontium (1793), cerium (1803), and chromium (1797) and confirmed the previous discoveries of tellurium (1798) and beryllium (1798). [7] [8] Klaproth was a member and director of the Berlin Academy of Sciences. [2]
Perey discovered it as a decay product of 227 Ac. [177] Francium was the last element to be discovered in nature, rather than synthesized in the lab, although four of the "synthetic" elements that were discovered later (plutonium, neptunium, astatine, and promethium) were eventually found in trace amounts in nature as well. [178]
The other compounds of the alkaline earth metals were discovered starting in the early 15th century. The magnesium compound magnesium sulfate was first discovered in 1618 by a farmer at Epsom in England. Strontium carbonate was discovered in minerals in the Scottish village of Strontian in 1790.
Adair Crawford was born in Crumlin, Belfast, the son of Rev Thomas Crawford. [2] He studied medicine at Glasgow and Edinburgh universities. He qualified MA in 1770 and then worked at St George's Hospital in London before qualifying MD in 1780.
Some authors credit Cruickshank with first suspecting an unknown substance in a Scottish mineral, strontianite, found near Strontian, in Argyleshire.Other authors name Adair Crawford for the discovery of this new earth, due to the mineral's property of imparting a redding color to a flame. [10]
Scientists recently discovered that the merger and collapse of two neutron stars makes an almost perfectly spherical explosion.
Celestine (the IMA-accepted name) [6] or celestite [1] [7] [a] is a mineral consisting of strontium sulfate (Sr S O 4). The mineral is named for its occasional delicate blue color. Celestine and the carbonate mineral strontianite are the principal sources of the element strontium, commonly used in fireworks and in various metal alloys.