potassium-39
短语释义与例句
n.
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1.
The major stable isotope of potassium, 3919K, having nineteen protons and twenty neutrons; it amounts to over 93% of the element in nature
不可数 物理
The major stable isotope of potassium, 3919K, having nineteen protons and twenty neutrons; it amounts to over 93% of the element in nature