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Cesium's atomic number is 55 and its symbol is Cs
Silver was the first metal to be used as currency
it is essential to balancing electrical charges in living cells
784 of them contained titanium
Roentgenium Element Cube Heritage Personal Museum Cesium's atomic number is 55Roentgenium's atomic number is 111 and its symbol is Rg. It is an extremely radioactive synthetic element that can be created in a laboratory but is not found in nature. The most stable known isotope, roentgenium 282, has a half life of 100 seconds. It is named after the physicist Wilhelm Rntgen (also spelled Roentgen), who also discovered X rays. Only a few roentgenium atoms have ever been synthesized, and they contain no current practical
