
高三物理_BK5_2
Quiz
•
Physics
•
9th - 12th Grade
•
Practice Problem
•
Hard
IK Wong
Used 2+ times
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7 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
"原子核 X " 發生 衰變,放射出一粒 α 粒子後變成為 Np - 237。
下列哪一個是 "原子核 X"?
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
填空: α粒子是____原子核.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
α粒子
β粒子
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
是非題: 半衰期是原子核全部發生衰變所需時間的一半.
正確
不正確
Answer explanation
半衰期是放射性元素的原子核有一半數量發生衰變所需要的時間.
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
碘-131 的半衰期為 8 日。
現有 16 g 的碘-131 發生衰變,
24日後, 未衰變原子核的質量是多少?
2g
4g
16/3 g = 5.333 g
14g
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
碘-131 的半衰期為 8 日。
現有 16 g 的碘-131 發生衰變,
24日後, 已衰變原子核的質量是多少?
2g
4g
16/3 g = 5.333 g
14g
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
某放射性樣本的初放射強度為 160 MBq,半衰期為 11 天。試估算樣本在 44 天後的放射強度。
0
10 MBq
40 MBq
80 MBq
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