relative atomic mass

英語（米国） (en-US) 英語（イギリス） (en-GB)

名詞

(physics) The ratio of the average mass per atom of the naturally occurring form of an element to 1/12 of the mass of a carbon-12 atom. Symbol Aᵣ; abbreviation RAM or r.a.m. For elements with several isotopes, the most stable isotope is treated as the representative.

日本語の意味

自然界に存在する元素の原子の平均質量を、炭素12原子の質量の1/12と比較して求めた値。元素の同位体が複数存在する場合は、最も安定な同位体が代表として用いられる。

英語の意味

(physics) The ratio of the average mass per atom of the naturally occurring form of an element to 1/12 of the mass of a carbon-12 atom. Symbol Aᵣ; abbreviation RAM or r.a.m. For elements with several isotopes, the most stable isotope is treated as the representative.

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To calculate the relative atomic mass of the sample, the students compared the isotopic abundances and atomic masses.

学生たちは試料の相対原子質量を求めるために同位体の存在比と原子質量を比較した。

詳細

意味（1）

(physics) The ratio of the average mass per atom of the naturally occurring form of an element to 1/12 of the mass of a carbon-12 atom. Symbol Aᵣ; abbreviation RAM or r.a.m. For elements with several isotopes, the most stable isotope is treated as the representative.