The number of neutrons minus the number of protons in the atom of an isotope. isotopic number is an indication of radioactivity.
在一个同位素的原子中中子数减去质子数,同位数是放射性的指示。
The number of neutrons minus the number of protons in the atom of an isotope. isotopic number is an indication of radioactivity.
在一个同位素的原子中中子数减去质子数,同位数是放射性的指示。
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