In a decay of 90Th232 by emission of an alpha particle, the daughter nucleus will be
A. 88Ra230.
B. 87Ac232.
C. 92U232.
D. 88Ra228.
E. 90Th228.
Answer: D
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Fill in the blank(s) with the appropriate word(s).
Tutankhamen's gold coffin weighs 250 pounds. What is the mass of the coffin in kilograms?
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