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1问题的提出上海科技出版社出版的拓展型课程《化学》(试验本)p.7指出“氯元素在自然界中有两种同位素35Cl和37Cl,它们的丰度分别为75.77%和24.23%,两种
1 PROBLEM PROBLEMS The extended course ”Chemistry“ (Experimental Version) published by Shanghai Science and Technology Publishing House p.7 states that ”Chlorine has two isotopes 35Cl and 37Cl in nature, with abundances of 75.77% and 24.23% Two kinds