CH-793
Relative atomic and molecular mass
Chemistry · Secondary 3 · Medium · Relative atomic and molecular mass
An element Q has three isotopes with mass numbers 30, 31 and 32. Their percentage abundances are 20%, 50% and 30% respectively. What is the relative atomic mass of Q?
- 30.8
- 31.0
- 31.1
- 31.5
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