Do you really want to send CentrX a message saying you like their work?
Symbol: Ac Atomic number: 89 Atomic weight: 227 (isotope with the longest known half-life) Density (at room temperature and pressure): 10.07 g/cc Melting point: 1,050°C Boiling point: 3,200°C Ground state electron configuration: [Rn]6d17s2