24-4: Half Life Problems
Chapter 24
Dr. Robert Belford & Rebekah Reinhart
Question 1
How many grams of
^{235}
U are left after 300 years if a sample originally weighed 26 grams and had a half life of 7.0*10
^{8}
years?
(A)
13 grams
(B)
26 grams
(C)
39 grams
(D)
NOTA
Hint
Your response
Not answered yet
Question 2
How many grams of
^{90}
Sr are left after 50 years if a sample originally weighed 125 grams and had a half life of 28.8 years?
(A)
37.5 grams
(B)
75 grams
(C)
125 grams
(D)
NOTA
Hint
Your response
Not answered yet
Question 3
How many grams of
^{232}
Tn are left after 2000 years if a sample originally weighed 677 grams and had a half life of 1.4*10
^{10}
years?
(A)
160 grams
(B)
336 grams
(C)
677 grams
(D)
NOTA
Hint
Your response
Not answered yet
Question 4
How many grams of
^{131}
I are left after 5.0 years if a sample originally weighed 18 grams and had a half life of 8.03 days?
(A)
0 grams
(B)
9 grams
(C)
18 grams
(D)
NOTA
Hint
Your response
Not answered yet
Question 5
How many grams of
^{137}
Cs are left after 1 year if a sample originally weighed 53 grams and had a half life of 30 years?
(A)
26 grams
(B)
44 grams
(C)
52 grams
(D)
NOTA
Hint
Your response
Not answered yet