Solved

Today, Uranium Contains 0.72%0.72 \% 235U235 \mathrm { U } (Half-Life = 0

Question 35

Multiple Choice

Today, uranium contains 0.72%0.72 \% 235U235 \mathrm { U } (half-life = 0.70 billion years) and 99.28%99.28 \% 238U{ } ^ { 238 } \mathrm { U } (half-life = 4.5 billion years) . At a time 1.9 billion years ago, what was the fraction of 235U235 \mathrm { U } in uranium?


A) 3.53%
B) 4.72%
C) 4.90%
D) 6.76%

Correct Answer:

verifed

Verified

Unlock this answer now
Get Access to more Verified Answers free of charge

Related Questions

Q30: When a neutron collides with a

Q33: The following masses are known: <br>

Q34: An excited <span class="ql-formula" data-value="^{236}_{92}"><span

Q38: A radioactive source emits 2.4-MeV neutrons

Q39: Suppose that starting with <span

Q40: A nuclear explosion results in a

Q58: Fermium-253 has a half-life of 3.00 days.A

Q72: A thallium source with a half-life of

Q77: What are the mass number A and

Q135: Two radioactive isotopes,X and Y,both decay to