isotopes and atomic mass

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标题	isotopes and atomic mass
描述	students were arranged in groups of three each of them given tasks to do, the tasks are as follows, writer, presenter, one on the machine
科目	化学
等级	高中
类型	指导活动
持续时间	120 分钟
是否包含答案	是
语言	英语
关键词	definition, stating
仿真程序	同位素和原子的质量 (HTML5)