Help please! PK – Lab Report Name: ____________________ Section: _______________
ID: 1399794 • Letter: H
Question
Help please!
PK – Lab Report Name: ____________________
Section: ___________________
Radioactive Decay
Data Table:
Trials
Time - minutes
Parents = Peas lying flat # per trial
Daughters = Peas on rounded side
# per trial | cumulative #
0
0
50
0 0
1
2
2
4
3
6
4
8
5
10
6
12
7
14
8
15
Graphing:
Graph the results of your experiment. Plot the number of parent atoms (peas) remaining after each trial on the y-axis. Plot the time on the x-axis.
Construct another graph. Plot the number of daughter atoms (peas) after each observation on the y-axis. Plot the time of the observation on the x-axis.
Explain the difference in the two graphs.
Determine the half-life of this hypothetical element from your graph.
Using the equation calculate the decay constant:
(ln 2 = 0.693) = 0.693/ t ½
Remember “ln” refers to the natural log.
Trials
Time - minutes
Parents = Peas lying flat # per trial
Daughters = Peas on rounded side
# per trial | cumulative #
0
0
50
0 0
1
2
2
4
3
6
4
8
5
10
6
12
7
14
8
15
Explanation / Answer
where are the results of the experiment?
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