Question 1

Which one of the following represents a fusion reaction that would yield large amounts of energy?

Accepted Answer

A)  238U92 + 1n0$\rightarrow$90Kr36 + 146Cs55 + 2H1 + 1n0 
B)  239Pu92 + 1n0$\rightarrow$96Sr38 + 141Ba56 + 31n0 
C)  238U92 $\rightarrow$234Th90 + 4He2 
D)  3H1 + 2H1 $\rightarrow$4He2 + 1n0 
E)  107Ag47 + 1n0 $\rightarrow$108Ag47 $\rightarrow$ 108Cd48 + 0e-1 
A)  238U92 + 1n0$\rightarrow$90Kr36 + 146Cs55 + 2H1 + 1n0 
B)  239Pu92 + 1n0$\rightarrow$96Sr38 + 141Ba56 + 31n0 
C)  238U92 $\rightarrow$234Th90 + 4He2 
D)  3H1 + 2H1 $\rightarrow$4He2 + 1n0 
E)  107Ag47 + 1n0 $\rightarrow$108Ag47 $\rightarrow$ 108Cd48 + 0e-1

Question 2

When 236U fissions the fragments are:

Accepted Answer

A)  always 140Xe and 94Sr 
B)  always identical 
C)  never 140Xe and 94Sr 
D)  never identical 
E)  none of the above 
A)  always 140Xe and 94Sr 
B)  always identical 
C)  never 140Xe and 94Sr 
D)  never identical 
E)  none of the above

Question 3

Most laser fusion projects attempt:

Accepted Answer

A)  proton-proton fusion 
B)  proton-deuteron fusion 
C)  deuteron-deuteron fusion 
D)  deuteron-triton fusion 
E)  triton-triton fusion 
A)  proton-proton fusion 
B)  proton-deuteron fusion 
C)  deuteron-deuteron fusion 
D)  deuteron-triton fusion 
E)  triton-triton fusion

Question 4

Which of the following chemical elements is not produced by thermonuclear fusion in stars?

Accepted Answer

A)  Carbon (Z = 6, A $\approx$12) 
B)  Silicon (Z = 14, A $\approx$ 28) 
C)  Oxygen (Z = 8, A $\approx$ 16) 
D)  Mercury (Z = 80, A $\approx$200) 
E)  Chromium (Z = 24, A $\approx$52) 
A)  Carbon (Z = 6, A $\approx$12) 
B)  Silicon (Z = 14, A $\approx$ 28) 
C)  Oxygen (Z = 8, A $\approx$ 16) 
D)  Mercury (Z = 80, A $\approx$200) 
E)  Chromium (Z = 24, A $\approx$52)

Exam 43: Energy From the Nucleus

Which one of the following represents a fusion reaction that would yield large amounts of energy?

When 236U fissions the fragments are:

Most laser fusion projects attempt:

Which of the following chemical elements is not produced by thermonuclear fusion in stars?

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When ²³⁶U fissions the fragments are: