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

1#

94.24: A sample of radioactive material has an initial activity of 1wyh2;o2*m:u3a cfux i 0,000 counts/minute. 30 minutes later, its activity is 2,500 counts/minute. The half-life of the materia a32m*:;2xw iucfoyh ul 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 element has a half-life of 4.0 hours. Approximately how muc*z:a, 4tz5f0w mmy,kcmnt i(uh of the radioactive e: 5m*4 0mntz ,ik(acwtumfzy,lement 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 are N atoms of an cn-ub(lq9zel )8z ytp z0.2dq5n+c hrd))xq lunstable isotope. After 20 minutes, only 1/16 q n)zt dc(e y b0pr+2qu-.)xzcqdlz8)h9 l ln5of them have not decayed. What is the half life 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 decays in 4 hours, wlv4z ;a ,6mroxe would estimate the sample's half life to ,ovz;r x mla64be 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

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

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 iae1xmm1 i6 g5fn hospitals to treat cancer. Its half-life is about 3.8 days. Starting with a pure sample ofi 1a1gm6e fxm5 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 undergoeog4kn /y 4va7k2 t*zqys 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-liah 9ky6zi mh )cyclj30y d2/8ufe of 2.0 yr. Approximately how much time must pask3z9c i2yh 6y)dhaly 8 jm/cu0s so that only 1/3 of the original sample 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

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 10qlv;be.nug 6:zk3mb7s:,es v jc .-sz)/bvsi0 seconds. If there are initially 10000e ,zqb-vjz6vs.c; k :/ g) ue.:3snmv7lsbbsi of these gas molecules in a closed container, approximately 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 substance Aaptinium dec+zl+zidjg :2 y8hd wfzx -dk+/ays via alpha-emission into Physicsbowliuiz ywd8h++d:+-/zfj kxz d2glm. The decay constant for this alpha-emission is 20 $s^{-1}$.
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 radio ;4fl5i 1n ksqa*7ghdractive substance Aaptinium decays via alpha-emission into Physicsbowlium. The decay constant for this alpha-emission ikn d54ifhs* lga 7;1qrs 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

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

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