Input interpretation
americium fermium | atomic mass
Results
americium | 243 u (unified atomic mass units) fermium | 257 u (unified atomic mass units)
americium | atomic mass | 243 u (unified atomic mass units) (atomic mass number given for longest-lived isotope) fermium | atomic mass | 257 u (unified atomic mass units) (atomic mass number given for longest-lived known isotope)
Relative values
| visual | ratios | | comparisons americium | | 0.95 | 1 | 5% smaller fermium | | 1 | 1.06 | 6% larger