?

SAT® Subject Test in Physics

Free Version

Upgrade subject to access all content

Difficult

Unknown Radioactive Substance

SATPHY-BKV0CX

The graph below shows the radioactive decay of some unknown substance. Below the graph is a table with a list of different radioactive substances and their half-lives. The graph best represents the decay of which of the listed substances?

Created for Albert.io. Copyright 2016. All rights reserved.

Substance Half-life
thorium-229 7,340 years
carbon-14 5,730 years
tin-126 10,000 years
curium-245 8,500 years
curium-250 9,000 years
A

thorium-229

B

carbon-14

C

tin-126

D

curium-245

E

curium-250