relative atomic mass

noun

🔊/ˌrelətɪv əˌtɒmɪk ˈmæs/

🔊/ˌrelətɪv əˌtɑːmɪk ˈmæs/

(also atomic mass, atomic weight)

(chemistry化学)

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the average mass of all the naturally occurring atoms of a chemical element相对原子质量