Chemical Elements.com - Einsteinium (Es)

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Basic Information | Atomic Structure | Isotopes | Related Links | Citing This Page

Basic Information

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
Classification: Rare Earth
Crystal Structure: Unknown
Density @ 293 K: Unknown
Color: Unknown

Atomic Structure

Number of Energy Levels: 7

First Energy Level:

Second Energy Level:

Third Energy Level:

Fourth Energy Level:

Fifth Energy Level:

Sixth Energy Level:

Seventh Energy Level:

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

MLA Format for Citing This Page

Bentor, Yinon. Chemical Element.com - Einsteinium. <http://www.chemicalelements.com/elements/es.html>.

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