1. Other
  2. Other
  3. the answers are given but how to get to them...

Question: the answers are given but how to get to them...

Question details

EXERCISE 1 1. The radium in a piece of lead decomposes at a rate which is proportional to the amount present. If 10 percent of the radium decomposes in 200 years, what percent of the original amount of radium will be lead after 1000 years? present in a piece of 2. Assume that the half life of the radium in a piece of lead is 1600 years. Hovw much radium will be lost in 100 years? 3. The following item appeared in a newspaper. The expedition used the carbon-14 test to measure the amount of radioactivity still present in the organic material found in the ruins, thereby determining that a town existed there as long ago as 7000 B.c. Using the half-life figure of C14 as given in the text, determine the approximate percentage of C14 still present in the organic material at the time of the discovery ANSWERS 1 1. 59.05 percent. 2. 4.2 percent.3. Between 32 percent and 33 percent.

the answers are given but how to get to them

Solution by an expert tutor
Blurred Solution
This question has been solved
Subscribe to see this solution