francium -8 -8 -8 -8 -8 -8 Fr-222 F 1,000 9,1.10 1,000 6,3.10 3,0.10 2,1.10 1,6.10 1,4.10 -8 -9 -9 -9 -9 -10 Fr-223 F 1,000 1,1.10 1,000 7,3.10 3,2.10 1,9.10 1,0.10 8,9.10