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A 116.8 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to 14.60 ng. How many half-lives of the unknown radioactive substance have occurred? number of half-lives: half-lives I TOOLS x10

A 116.8 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to 14.60 ng. How many half-lives of the unknown radioactive substance have occurred? number of half-lives: half-lives I TOOLS x10

Chemistry: Matter and Change
Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter24: Nuclear Chemistry
Section24.2: Radioactive Decay
Problem 9PP
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A 116.8116.8 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to 14.6014.60 ng. How many half‑lives of the unknown radioactive substance have occurred?
number of half-lives:
 
half-lives
A 116.8 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to 14.60 ng. How many half-lives of the unknown radioactive substance have occurred? number of half-lives: half-lives * TOOLS x10
Transcribed Image Text:A 116.8 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to 14.60 ng. How many half-lives of the unknown radioactive substance have occurred? number of half-lives: half-lives * TOOLS x10
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