EINSTEINIUM





Einsteinium 3464
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Einsteinium

Overview

Einsteinium is a member of the actinide family. The actinide elements are found in Row 7 of the periodic table, a chart that shows how chemical elements are related to each other. The actinides fall between radium (element number 88) and rutherfordium (element number 104). They are usually listed in a separate row at the very bottom of the periodic table.

Einsteinium is also a transuranium element. Transuranium elements are those beyond uranium on the periodic table. Uranium has an atomic number of 92, so elements with larger atomic numbers are transuranium elements.

SYMBOL
Es

ATOMIC NUMBER
99

ATOMIC MASS
252.0828

FAMILY
Actinide
Transuranium element

PRONUNCIATION
ein-STY-nee-um

Discovery and naming

Einsteinium was discovered by a research team from the University of California at Berkeley. The team was led by Albert Ghiorso (1915- ). The element was discovered in the "ashes" after the first hydrogen bomb test in November 1952 at Eniwetok Atoll, Marshall Islands, in the Pacific Ocean. The discovery was a remarkable accomplishment because no more than a hundred millionth of a gram of the element was present. It was detected because of the characteristic radiation it produced.

Element number 99 was named after German-American physicist Albert Einstein (1879-1955). Some people regard Einstein as the greatest scientist who ever lived.

Physical and chemical properties

Too little einsteinium has been prepared to allow scientists to determine its physical and chemical properties.

Occurrence in nature

Einsteinium does not occur naturally in the Earth's crust.

Isotopes

All isotopes of einsteinium are radioactive. The most stable is einsteinium-252. Its half life is 20.47 days. Isotopes are two or more forms of an element. Isotopes differ from each other according to their mass number. The number written to the right of the element's name is the mass number. The mass number represents the number of protons plus neutrons in the nucleus of an atom of the element. The number of protons determines the element, but the number of neutrons in the atom of any one element can vary. Each variation is an isotope. A radioactive isotope is one that breaks apart and gives off some form of radiation.

The half life of a radioactive element is the time it takes for half of a sample of the element to break down. For example, suppose that scientists made 10 grams of einsteinium. About three weeks later (20.47 days later), only 5 grams of the element would be left. After another three weeks (20.47 days more), only half of that amount (2.5 grams) would remain.

Extraction

Einsteinium is not extracted from the Earth's crust.

Uses

Einsteinium is sometimes used for research purposes, but it has no practical applications.

Compounds

There are no commercially important compounds of einsteinium.

Albert Einstein. The element einsteinium is named after the great physicist.
Albert Einstein. The element einsteinium is named after the great physicist.

Einsteinium was named after the great German-American physicist, Albert Einstein.

Health effects

Scientists know too little about einsteinium to be aware of its health effects. As a radioactive element, however, it does pose a threat to human health.



User Contributions:

garrett
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Mar 7, 2007 @ 7:07 am
this article helped me complete my project in 10th grade chemistry pre ap. Thank you for posting this information.
sarahjayne
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Nov 19, 2008 @ 3:03 am
this is a very helpufl website for science revision
tyler
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May 12, 2009 @ 3:15 pm
this artice helped me do my project in 7th grade. Thank you it helped alot!
Paul
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May 27, 2009 @ 10:22 pm
Thanks for the post this just helpde me complete my cube for 8th Grade Science. Thanks again.
Matt
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Sep 13, 2009 @ 10:22 pm
Used this for part of an 11th grade chemistry assignment. Thanks!
none of ur bisuness
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Nov 12, 2009 @ 4:16 pm
helped me in 8th grade science project thanks alot
melissa
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Nov 25, 2009 @ 5:17 pm
thankyou for displaying this information clearly, it helped a lot!!
estrella
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Nov 28, 2009 @ 3:15 pm
this website helped me for my project and I wil recomend this website to others
Sahara
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Dec 11, 2009 @ 9:21 pm
thank you! it helps me on my 6th grade research and i like the way this article was written
Nick
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Aug 28, 2010 @ 2:14 pm
This article helped me on my 10th grade Honors Chem project. Thanks for posting!
U ain't gonna find out
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Dec 7, 2010 @ 6:18 pm
Thanks! I really loved this website I'll recommened it to everybody! :)
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Dec 9, 2010 @ 6:18 pm
I googled this becuase I was reading the Genius book on Einstein when my 10-year old son verbally told me there was an Einstein element. True to his knowledge, there is. Great thinking son!
me me
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Dec 15, 2010 @ 10:22 pm
This is so awesome.
You answred all my questions! =D
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Jan 25, 2011 @ 11:11 am
thanks this really helped me do my project in high school its really helpful thanks again !
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Feb 17, 2011 @ 6:18 pm
This article has help me complete my Chem. assignment. Thanks.
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Aug 30, 2011 @ 1:13 pm
Thanks this really helped out on my 8th grade project!
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Sep 6, 2011 @ 9:21 pm
thanks for the information it helped me with my project for science
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Oct 4, 2011 @ 3:15 pm
no impotant compunds? thats a lie! every compound is impotant
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Oct 15, 2011 @ 7:19 pm
helpful but wish is stated who used this element, what it was used for back then, and what its used for currently today
C-dog
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Nov 1, 2011 @ 4:16 pm
this article helped me complete an 8th grade assignment . where has education come to
mathew
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Nov 28, 2011 @ 8:20 pm
i have a 5 page report due tomorrow and i couldn't find any info. this was the only website that had new information. thanks
Nancy
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Dec 11, 2011 @ 9:09 am
now is more good information about the chemical element and the great Albert Enstein great Thank you for the information we recommend this site to my friends =)
Shpat
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Jan 20, 2012 @ 1:13 pm
This is very helpful to me and gives me an advantage of knowledge in chemistry science top set, thank you! I will recommend this site!
jessi
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Sep 11, 2012 @ 5:17 pm
Einstein is number one yes! long live his legacy.I've always admired him and the best thing was that he was he was so smart.
smiles
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Dec 11, 2012 @ 4:16 pm
it was really helpful to me for my project in school
Alicia
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Dec 18, 2012 @ 4:16 pm
Einstein did not really create the equation E=Mc2. He only finished it.
soore
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Mar 5, 2013 @ 5:17 pm
this website helped me understand chemistry. i give it a 90 percent :)
kaelyn
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Sep 11, 2014 @ 11:11 am
This helped me to finish an assignment in science,and all the other sites I visited didnt help.Thanks!!!
La'Guyia
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Sep 15, 2014 @ 12:12 pm
I used this for a foldable in Science,I got a 100% Thanks guys!
La'Guyia
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Oct 1, 2014 @ 11:11 am
I used this for a foldable in Science and got 0%. THAnKS UGYS

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