Half-Life

QuizÂ by Hannah Keener

Feel free to use or edit a copy

includes Teacher and Student dashboards

### Measure skillsfrom any curriculum

Measure skills

from any curriculum

Tag the questions with any skills you have. Your dashboard will track each student's mastery of each skill.

With a free account, teachers can

- edit the questions
- save a copy for later
- start a class game
- view complete results in the Gradebook and Mastery Dashboards
- automatically assign follow-up activities based on studentsâ€™ scores
- assign as homework
- share a link with colleagues
- print as a bubble sheet

### Our **brand new** solo games combine with your quiz, on the same screen

Correct quiz answers unlock more play!

5 questions

Show answers

- Q1The half-life of Selenium-83 is 25 minutes. How long does it take for a 100mg sample to decay to 12.5mg?25 minutes100 minutes0 minutes75 minutes120s
- Q2The half-life of Po-218 is 3 minutes. How much of a 2.0 gram sample remains after 12 minutes?0.1252.5.0625120s
- Q3The half-life of an isotope is 2 years. How many years would it take for a 4 mg sample of the isotope to decay and have only 0.50 mg of it remain?2 years5 years10 years6 years120s
- Q4Actinium-226 has a half-life of 29 hours. If 100 mg of actinium-226 disintegrates over a period of 58 hours, what fraction of the original actinium-226 will remain?1/81/41/22120s
- Q5The half-life of iodine-125 is 60 days. How many half-lives will have occurred after 360 days?210636120s