Lawrencium

Lawrencium is a chemical element. Before being officially named, it was known as eka-lutetium and unniltrium. It has the symbol Lr. It has the atomic number 103. It is a group 3 element and transition metal, but is also often counted as an actinide.[1]

It is a radioactive element that does not exist in nature. It has to be made. Lawrencium is made from californium. The isotope that has the longest half-life (262Lr) has a half life of about 3.6 hours.

No uses for lawrencium are known. What lawrencium looks like is not known because not enough has been made to see it with human eyesight.

Discovered by Albert Ghiorso and co-workers in 1961, in California. Named after Ernest O. Lawrence, inventor of the cyclotron, a research instrument with which several new elements have been found/made.

References

  1. ↑ Scerri, Eric (2021). "Provisional Report on Discussions on Group 3 of the Periodic Table". Chemistry International. 43: 31–34. doi:10.1515/ci-2021-0115.
Periodic table
H   He
Li Be   B C N O F Ne
Na Mg   Al Si P S Cl Ar
K Ca   Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Rb Sr   Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
Alkali metals Alkaline earth metals Lanthanides Actinides Transition metals Poor metals Metalloids Other nonmetals Halogens Noble gases


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