Chemical symbols are abbreviations of an element's name used as a shorthand when writing chemical formulas. Given that some elements have names as long as protactinium, writing the full name in a chemical formula would make things very difficult to follow. ...
A minority of the "new characters" are not actually new inventions, or rather, they happen to coincide with archaic characters, whose original meanings have long been lost to most people. For example, 鏷 (protactinium), 鈹 (beryllium) and 鉻 (chromium) are obscure characters meaning "raw iro...
For these elements, the symbol usually refers to an older name that isn't used anymore. History of the Abbreviations There are eleven element abbreviations that don't seem to match their modern names. Those are subtle reminders of thehistory of the Periodic Tableand the process of the discover...
First up isA Tale of Seven Elementsby Eric Scerri. This book covers seven elements — protactinium, hafnium, rhenium, technetium, francium, astatine and promethium — that were discovered in the first half of the 20th century. Chapter 9 focuses on promethium and provided a useful overview at ...
click on any element's name for further information on chemical properties, environmental data or health effects.This list contains the 118 elements of chemistry.The chemical elements of the periodic chart sorted by: Atomic Mass Name chemical element Symbol Atomic number - Name alphabetically 1.0079...
Protactinium Pa 91 Radium Ra 88 Radon Rn 86 Rhenium Re 75 Rhodium Rh 45 Roentgenium Rg 111 Rubidium Rb 37 Ruthenium Ru 44 Rutherfordium Rf 104 Samarium Sm 62 Scandium Sc 21 Seaborgium Sg 106 Selenium Se 34 Silicon Si 14 Silver Ag 47 Sodium Na 11 Strontium Sr 38 Sulfur S 16 Tantalum Ta...
Atomic Number:86 Symbol:Rn Atomic Weight:222.0176 Discovery:Fredrich Ernst Dorn 1898 or 1900 (Germany), discovered the element and called it radium emanation. Ramsay and Gray isolated the element in 1908 and named it niton. Electron Configuration:[Xe] 4f145d106s26p6 ...
protactinium Pa 91 231.03588 uranium U 92 238.02891 neptunium Np 93 (237) plutonium Pu 94 (244) americium Am 95 (243) curium Cm 96 (247) berkelium Bk 97 (247) californium Cf 98 (251) einsteinium Es 99 (252) fermium Fm 100 (257) mendelevium Md 101 (258) nobelium...
← Protactinium Neptunium → General Properties Symbol U Atomic Number 92 Atomic Weight 238.02891 Isotopes Group Period 7 Block fPhysical PropertiesDensity 19 g/cm³ Atomic Volume 12.5 cm³/mol Atomic Radius 1.38 Å Covalent Radius --...
is done on astronaut helmets to protect them from uv radiation. the price of the metal is determined through trading in gold. related elements holmium tungsten thallium radium erbium rhenium lead actinium thulium osmium bismuth thorium ytterbium platinum polonium protactinium lutetium francium astatine ...