argon-40
短语释义与例句
n.
-
1.
The major stable isotope of argon, 4018Ar, having eighteen protons and twenty-two neutrons; it amounts to about 99.6% of the element in nature
不可数 物理
The major stable isotope of argon, 4018Ar, having eighteen protons and twenty-two neutrons; it amounts to about 99.6% of the element in nature