Isotopic abundance
Mass Spectrometry · Chemistry
Molecule viewer
Interactive 3DBall-and-stick models with true bond angles — switch molecule to compare shapes.
Controls
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Study notes
M⁺ at 120 with M+1 at 8.8% relative height. Estimate carbon count. Step 1: Each C contributes ~1.1% to M+1. Step 2: Number of C ≈ 8.8 / 1.1 = 8. Step 3: 8 carbons → e.g., C₈H₈O (120) or similar. Step 4: M+1 counts carbons — isotope arithmetic!