What we know about Francium Luis A. Orozco, Adrian Perez Galvan, Dong Sheng and the FRTRAP collaboration Joint Quantum Institute University of Maryland Francium is the heaviest alkali atom. There is much less than an ounce of francium at any given time in the whole Earth. It is the most unstable element of the first 103 in the periodic table, and its longest lived isotope lasts 20 minutes. Its atomic and nuclear structure makes it an ideal laboratory to study the weak interaction. Laser trapping and cooling in line with an accelerator has opened the precision study of its atomic structure and will allow parity non-conservation measurements on its electronic levels. I will present our proposal for a measurement of the nuclear anapole moment in a chain of francium isotopes through parity non-conserving transitions in the ground state hyperfine manifold. Supported by NSF