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Lawrencium
Lawrencium (Lr)
History
Periodic Placement
Properties
Created by Albert Ghiorso, Torbjørn Sikkeland, Almon E. Larsh and Robert M. Latimer in 1961
Physical properties are mostly unknown
but it is most likely a metalic and silvery white solid.
Melting Point: 1900 K
It is a radio active synthetic element.
Half-life: 216 minutes
Most stable isotope: 262
Lawrencium is in group 3 on the periodic table
It was created when the scientists placed three micrograms of califorium in a linear accelerator and bombarded it with Boron ions.
Nature
Lawrencium is not naturally occurring.
The element is man-made, and is
not abundant nor found on Earth
The element is placed at the bottom of the periodic table because of its atomic number as well as it being a metal.
There are no uses for it outside of scientific research
Isotopes of Lawrencium
The element was named after the scientist Ernest O. Lawrence
There are no stable isotopes, but there are eleven radioisotopes, going from 252Lr to 262Lr
It is in the Actinides family
The isotopes have no know uses besides scientific research.
Safety Of Lawrencium
Lawrencium is radioactive in its purest form
It can be handled carefully, but not in large quantities because of its radioactivity
The half lives of the isotopes are range from 390ms (252Lr) to 216 minutes (262Lr)
The properties of the isotopes besides the half lives are the same
Atomic Structure
Linear Accelerator
Atomic Number: 103
Atomic mass: 262 amu
Protons: 103
Electrons: 159
Valence Electrons: 3
Notations
Electron Configuration Notation:
Lawrencium safety and information video
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2
4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d1
Orbital Notation:
Sources
"It's Elemental - The Element Lawrencium." Science Education at Jefferson Lab.
Web. 13 Feb. 2012. <http://education.jlab.org/itselemental/ele103.html>.
Noble Gas Notation:
Mean, Production I. "Lawrencium Facts." Buzzle Web Portal: Intelligent Life on the Web. Web. 13 Feb. 2012. <http://www.buzzle.com/articles/lawrencium-facts.html>.
Dingrando, Laurel. Chemistry: Matter and Change. New York, NY: Glencoe/McGraw-Hill, 2005. Print.
[Rn] 5f14 7s2 7p1
Albert Ghiorso