Input interpretation
astatine iodine | atomic mass
Results
astatine | 210 u (unified atomic mass units) iodine | 126.90447 u (unified atomic mass units)
astatine | atomic mass | 210 u (unified atomic mass units) (atomic mass number given for longest-lived isotope)
Relative values
| visual | ratios | | comparisons iodine | | 0.604 | 1 | 39.6% smaller astatine | | 1 | 1.65 | 65% larger