Lawrencium Lawrencium 103 Lr (262) By: Declan McCarthy

Lawrencium Properties: Many are unknown! This is because Lr is not found in nature and only exists because it was synthesized. It does not stay around long enough for it to be well studied. 1. The appearance is most likely silvery-white or gray and metallic. 2. It is a radiation hazard in small amounts. 3. Its chemical properties are somewhat like the actinides but somewhat like the transitional metals. 4. Melting point is 1900 K. 5. Ten isotopes are known: Lr Lr Uses: Since very little Lawrencium has ever been made, there are no known uses.

Lawrencium This element got its name in honor of the name of Ernest O. Lawrence, inventor of the cyclotron. The symbol Lw was originally used but in 1963 it was changed to Lr. In August 1997 the International Union of Pure and Applied Chemistry (IUPAC) ratified the name lawrencium and symbol Lr during a meeting in Geneva, Switzerland. This element got its name in honor of the name of Ernest O. Lawrence, inventor of the cyclotron. The symbol Lw was originally used but in 1963 it was changed to Lr. In August 1997 the International Union of Pure and Applied Chemistry (IUPAC) ratified the name lawrencium and symbol Lr during a meeting in Geneva, Switzerland. Lawrencium is not found on earth except when it is made in laboratories. It was made by bombarding a small target composed of three isotopes of californium with boron-10 and B-11 ions in the Heavy Ion Linear Accelerator. The changed nuclei became electrically charged, were recoiled in a helium atmosphere and were then collected on a thin conveyor tape made out of copper. This tape was then moved in order to place the collected atoms in front of a series of detectors. The detectors verified the atomic number of 103. Lawrencium is not found on earth except when it is made in laboratories. It was made by bombarding a small target composed of three isotopes of californium with boron-10 and B-11 ions in the Heavy Ion Linear Accelerator. The changed nuclei became electrically charged, were recoiled in a helium atmosphere and were then collected on a thin conveyor tape made out of copper. This tape was then moved in order to place the collected atoms in front of a series of detectors. The detectors verified the atomic number of 103.

Lawrencium: Ode to the Unknown Lawrencium, what do you look like? How do you feel? When do you boil? What’s the deal? Lawrencium, what are you used for? What good are you? Why don’t you stay around? Why are you always new? Lawrencium, what are your properties? What is your state? Why do you matter? What is your fate?

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