Themes > Science > Chemistry > General Chemistry > Elements > Online Interactive Periodic Table of the Elements > Einsteinium

Name: Einsteinium
Symbol: Es
Atomic Number: 99
Atomic Mass: (252.0) amu
Melting Point: Unknown
Boiling Point: Unknown
Number of Protons/Electrons: 99
Number of Neutrons: 153
Crystal Structure: Unknown
Density @ 293 K: Unknown
Color: Unknown

Atomic Structure

[Bohr Model of Einsteinium]  
Number of Energy Levels: 7

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 32
    Fifth Energy Level: 29
    Sixth Energy Level: 8
    Seventh Energy Level: 2

Isotopes

Isotope Half Life
Es-246 7.7 minutes
Es-248 26.0 minutes
Es-249 1.7 hours
Es-250 8.6 hours
Es-251 1.4 days
Es-252 1.3 years
Es-253 20.5 days
Es-254 276.0 days
Es-254m 1.6 days
Es-255 40.0 days
 

Facts

Date of Discovery: 1952
Discoverer: Argonne, Los Alamos, University of California
Name Origin: After Albert Einstein
Uses: No uses known
Obtained From: Man-made


Information provided by: http://www.chemicalelements.com