Einsteinium

                               

• Einsteinium (Es) is a radioactive and soft, silvery, paramagnetic metal having atomic number 99.
• Einsteinium is attacked by oxygen, steam and acids but not by alkalis.
• A highly reactive metal & therefore strong reducing agents are needed to obtain the pure metal from its compounds.
• Einsteinium-254 was used as the calibration marker in the chemical analysis spectrometer. 
• Einsteinium has a potential use in radiation therapy.