Half-life and decay constant - 题库网 (tiku.one)

1#

94.24: A sample of radioactive material ha/a2)y;zksom os an initial activity of 10,000 counts/minute. 30 minutes later, its activia yk oz)2so;/mty is 2,500 counts/minute. The half-life of the material is:

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

95.22: A radioactive elemu;b t/auc *rm/ent has a half-life of 4.0 hours. Approximately how much of the radioactive c;uut //r*mabelement will remain after 12.0 hours?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

97.25: Originally there arex 8csa0zg ce4)m6g t.j N atoms of an unstable isotope. After 20 minutes, only 1/16 of them have not decayed. What is the half li4 6 mg. 8csj0zce)xtagfe of the isotope?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

01.17: If 25% of a sample of a radioactive isotope *ub vqox./ /yjdecays in 4 hours, we would estibquy/ xjov /.*mate the sample's half life to be about

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

04.06: Radon gas emits gamma rays and is used in hospitals ;fxv7-qf 0hveto treat cancer. Its half-life is aboutvveqfhx0-7 f; 3.8 days. Starting with a pure sample of radon, the percentage left after 19 days will be about

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

07.50: A gas undergoeei ggo-i0/v /oxn-q;ai. m6qzs radioactive decay with time constant $\tau$. A sample of 10000 particles is put into a container. After one time constant has passed, the experimenter places another 10000 particles into the original container. How much time passes from the addition of the particles until the container of gas reaches 10000 total particles again?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

08.47: A radioactive sample decays with a half-liiqa/y on 3p88nt::jn-o3shx afe of 2.0 yr. Approximately how much time must pass so that only 1/3 of the original sa-3q j3:aaospix:/8nyhn t 8nomple remains?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

10.44: A radioactive sample of gas has a half-life of 100 seconds. If there are -(4-/dd 2oyb mg4abhhrlwuj/initially 10000 of these gas molecules in a closed container, -g d /rmowl jy2(ubbh-h4d/ 4aapproximately how many of the molecules remain after a time of 250 seconds elapses?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A hypothetical radioactive iwq*e ; x;i;nssubstance Aaptinium decays via alpha-emission into Physicsbowlium. The decay constant for this alpha-emission is 20 ;isw*x n; qe;i$s^{-1}$.
12.41: Which one of the following statements correctly compares Physicsbowlium to Aaptinium?

A. Physicsbowlium has 4 fewer protons and 2 fewer neutrons than Aaptinium.

B. Physicsbowlium has 4 fewer neutrons and 2 fewer protons than Aaptinium.

C. Physicsbowlium has 2 fewer protons and 2 fewer neutrons than Aaptinium.

D. Physicsbowlium has 4 fewer protons than, and the same number of neutrons as, Aaptinium.

E. Physicsbowlium has 2 fewer protons than, and the same number of neutrons as, Aaptinium.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A hypothetical radioactive substance Aaptinium decaycx(* sncp1u+bh 9fr0ps via alpha-emission into Physicsbowlium. The decay constant for this alpha-( +b1p9c*rc x spuh0nfemission is 20 $s^{-1}$.
12.42 What is the half-life of Aaptinium?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

账号		自动登录	找回密码
密码			立即注册

未使用图片

本次作答已使用