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Question
Write the different types of isotopes of oxygen and their percentage abundance.
Sum
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Solution
Isotopes of oxygen:
| Isotope | Mass (amu) | % abundance |
| `""_8"O"^16` | 15.9949 | 99.757 |
| `""_8"O"^17` | 16.9991 | 0.038 |
| `""_8"O"_18` | 17.9992 | 0.205 |
The atomic mass of oxygen = (15.9949 × 0.99757) + (16.9991 × 0.00038) + (17.9992 × 0.00205) = 15.999 amu.
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