Half-Life
Authored by Lisa Thompson
Science
10th Grade
NGSS covered
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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed?
100.0g
50.0g
12.5g
8.5g
Tags
NGSS.HS-PS1-8
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Fermium-253 has a half-life of 0.334 seconds. A radioactive sample is considered to be completely decayed after 10 half-lives. How much time will elapse for this sample to be considered gone?
0.334 seconds
3.34 seconds
1.77 seconds
13.4 seconds
Tags
NGSS.HS-PS1-8
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Barium-122 has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?
0.25g
2.5g
25g
80g
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The diagram shows 32 atoms
32 of the Red are the parent isotope
0 of the atoms are daughter isotopes
How many half-lives have occurred?
0
1
2
3
Tags
NGSS.HS-PS1-8
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The diagram shows 32 atoms.
16 of the Red are parent isotopes
16 of the Green are daughter isotopes
How many half-lives have occurred?
0
1
2
3
Tags
NGSS.HS-PS1-8
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Imagine you have 50,000 atoms of uranium-238. If U-238 has a half-life of 4.5 billion years, how many U-238 atoms will be left after 4.5 billion years?
25,000
50,000
12,500
0
Tags
NGSS.HS-PS1-8
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
You have 100 grams of radioactive C-14. The half life of C-14 is 5730 years.
How many grams are left after 1 half life?
100 grams
25 grams
2 grams
50 grams
Tags
NGSS.HS-PS1-8
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