9:46 PM Fri Jul 14 3C2 1 CI 2- + 2 Li Be Lithium Beryllum 6.94 90122 5 Rb Sr 7 155 6 Cs Ba 13733 (s) 12 Mg Sodium Magnesium 22.990 24305 3 Na 2 19 4 K 39.098 37 20 Ca 87 38 5 80 82 88 7 Fr Ra Franclum Radium 223 pull up for additional resources Rubidum Stronum Ytrium 85.468 8762 88.905 Calcium Scandium Titanium Varadum Chromium 44.958 47 887 51.996 39 56 Ptable 21 Sc H Gas Rf Unknown 3 89-103 72 57-71 Hf 41 40 Zr Nb Zirconium Niobium 91.224 92.906 57 6 La 89 7 Ac Lanthanum Cerium 138.91 140.12 90 Th 23 24 25 Mn Cr V 4 58 Ce Actinium Thorium metals 75 176 73 Ta W Re Os Hathium Tantalum Tungsten Rhenium, Osmlum 180.95 105 183 84 106 104 Rf Db Sg Auferbedin Dubnium Sead 3 (1) Reset Actinoids (Actinides) 42 Mo Mohdu 95.95 ld 43 Tc LO Manganese, Iron 54938 55.845 5 126 Fe 59 60 Pr Nd Pasendium Nerdymium 140.91 144.24 92 Question 19 of 61 Co 58.933 45 Rh Rutenium Rhodium 101.07 102.91 107 108 Bh Bohnium Has (270) For elements with no stable isotopes, the mass number of the isotope with the longest haffe 44 Ru Ca(s)