“mass number”的概念、定义、翻译、参考文献-科学参考

单词	mass number
释义	mass number Physics See nucleon number. Chemistry See nucleon number. Chemical Engineering The number of neutrons and protons in the atomic nucleus of an atom (i.e. nucleons). For example, uranium-238 comprises 92 protons and 146 neutrons. Geology and Earth Sciences The sum of the protons and neutrons in the nucleus of an atom.
随便看	a priori a priori/a posteriori a priori (in statistics) AprizeSat-3 and -4 aprotic apsacline APSE apse apsidal motion apsides apsis Ap star APT aptation Apterygota Aptian Apt, Jay (1949– ) aptychus APU Apuleius (c.ad 125–80) Apus APW APXS Apéry’s constant AQL

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