"Californium is rare earth pademonium "

 

 

History

            Californium was made and discovered by four scientists (Stanley G. Thompson, Kenneth Street, Albert Ghioroso and Glenn T. Seaborg) working at he University of California, Berkley, in 1950. They used a devise called cyclotron. This Produced atoms of Californium. It was the sixth transuranium element to be discovered.

Radioactive Decay
            Radioactive decay is when an unstable atomic nucleus loses energy by releasing radiation. This results in an atom of one type transforming into a atom of a different type.

Isotopes
            Isotopes are any different types of atoms of the same chemical element each having a different atomic mass. Isotopes of the exact same element have nuclei with the same number of protons but different number of neutrons. They all have different mass numbers, which allows us to get the total number of nucleons.

Half-life
            Half-life describes the amount of time needed to undergo decay. As an example Thallium decays into lead with a half-life of 3.05 minutes. This means half a sample of Thallium will decay and turn into lead in 3.05 minutes.

CALIFORNIUM! CALIFORNIUM!
   

 
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Atomic number

98

Atomic weight

251

Melting Point

1173 K

Element Classification

Metal

Group Name

Actinide

   
     
     
     

 

Link to another classmate's site here.

 

 
Glossary


Cyclotron- is a particle accelerator that accelerate charged particles using a high frequency, altering voltage
Alpha Decay- Is a type of radioactive decay where an atomic nucleus releases an alpha particle and transforms into an atom
Beta Decay- Is a type of radioactive decay where a beta particle is released
Nuclear Reactor- a nuclear reactor is a machine in which nuclear chain reactions happen and kept at a steady rate.
Aqueous Solution- is a solution where the solvent is water
Microgram- is a 1/1,000,000 of a gram, it one of the smallest units of weight used.

 
 
Bibliography


"Californium." Periodic Table of the Elements. 27 Feb. 2009 <http://periodic.lanl.gov/elements/98.html>.
"Californium." Wikipedia- The Free Encyclopedia. 27 Feb. 2009 <http://en.wikipedia.org/wiki/Californium>.
"Californium." Wikipedia- The Free Encyclopedia. 27 Feb. 2009 <http://en.wikipedia.org/wiki/Californium>.
"The Element Californium." Jefferson Lab. 27 Feb. 2009 <http://education.jlab.org/itselemental/ele098.html>.
"Half-Life." Jefferson Lab. 27 Feb. 2009 <http://education.jlab.org/glossary/halflife.html>.
Newton, David E. Chemical Elements. Vol. 1. Farmington Hills, MI: The Gate Group, 1999.

 

Link

Check out a Berkelium webpage here!

 

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