iron-57
短语释义与例句
n.
-
1.
A minor stable isotope of iron, 5726Fe, having 26 protons and 31 neutrons; it amounts to about 2% of the element in nature
不可数 物理
A minor stable isotope of iron, 5726Fe, having 26 protons and 31 neutrons; it amounts to about 2% of the element in nature