用一束紫外线照射某金属时不能产生光电效应,可能使该金属产生光电效应的措施是
Answer key
B
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用一束紫外线照射某金属时不能产生光电效应,可能使该金属产生光电效应的措施是
B
在存放放射性元素时,若把放射性元素①置于大量水中;②密封于铅盒中;③与轻核
元
素结合成化合物.则
D
中档题为主
原子核的衰变与半衰期
单选 2
中档 2
7 · 易错
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