Column Descriptions Relative Isotopic Standard Isotope Atomic Mass Composition Atomic Weight Notes _________________________________________________________________________ 16 S 32 31.9720711744(14) 0.9499(26) [32.059,32.076] 33 32.9714589098(15) 0.0075(2) 34 33.967867004(47) 0.0425(24) 36 35.96708071(20) 0.0001(1) _________________________________________________________________________NIST | Physical Measurement Laboratory | Physical Reference Data | Atomic Weights and Isotopic Compositions Main Page