2015 Shanghai Question 6 Single-choice Differentiating 2015_上海卷 (物理) 6.23290Th经过一系列a衰变和b衰变后变成20882Pb,则20882Pb比23290Th少 A. 16个中子,8个质子B. 8个中子,16个质子C. 24个中子,8个质子D. 8个中子,24个质子 Answer keyA ☆ SaveCan't do it, show the explanation查看原卷 →