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If a 200 g sample of Radon-220 has a half-life of 55 seconds. How much material is left after 220 seconds? A 12.5 g B) 25 g c) 55 g D) 100 g
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2 votes
If a 200 g sample of Radon-220 has a half-life of 55 seconds. How much material is left after

220 seconds?
A 12.5 g
B) 25 g
c) 55 g
D) 100 g

User BordiArt
by
4.4k points

2 Answers

5 votes

The answer is B 12.5g

User Arvind Haran
by
4.2k points
6 votes
The answer is A - 12.5 grams. Every 55 seconds, half of the Radon would decay. After 220 seconds, this process would have occurred 4 times.
User Satwik Nadkarny
by
4.8k points
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