The element represented by the symbol "E" is Einsteinium.
Einsteinium is a synthetic element with the symbol Es and atomic number 99. It is named after Albert Einstein. As a synthetic element, it is not found naturally on Earth and is produced in small quantities in high-flux nuclear reactors. Einsteinium is a radioactive actinide metal.
Because only minuscule amounts of einsteinium have ever been produced, its properties are not well-characterized.
