Physical Chemistry

Nuclear chemistry Solutions

If we started with 65 grams of Gold-198 a. What daughter element will be produced? b. How much of that element will be present after 4 half lives? c. How much time has passed?

We ended with 15 grams of Xenon-131 and 3 half lives have passed. a. What element was it originally? (What was its radioactive version) b. How much of this radioactive element did we originally have? (Hint: This was Beta decay)

The half-life of Palladium-100 is 4 days. After 16 days a sample of Palladium-100 has been reduced to a mass of 6 mg. What was the initial mass (in mg) of the sample?__________ What is the mass 5 weeks after the start? ________

What number completes the missing part of this nuclear equation?: ²⁴₁₁ Na → ²³_F +⁴₂α

A rare isotope of a nuclear material is very unstable, decaying at a rate of 14% each second. Find how much isotope remains 11 seconds after 5 grams of the isotope is created.

If a rock sample was found to contain 6.93 x 10^-7 mol of argon-40, how much potassium-40 would also have to be present for the rock 1.3 x 10^9 years old? The half-life of K-40 is 1.3 x 10^9 years. ______ mol K-40

The table below lists information about the radioactive decay of three nuclides. Fill in the missing information. nuclide decay mode daughter nuclide 88 Y electron capture ___________ 39 150 146 Gd ___________________ Sm 64 62 _________ alpha emission 176 Hf 72

The beryllium-10 nuclide radioactively decays by beta emission. Write a balanced nuclear chemical equation that describes this process.

The table below lists information about the radioactive decay of three nuclides. Fill in the missing information. nuclide decay mode daughter nuclide 3 H beta emission _________ 1 234 _____ alpha emission Th 90 99 99 Tc _____________ Ru 43 44

Suppose an aluminum-27 nuclide transforms into a sodium-24 nuclide by absorbing a neutron and emitting an alpha particle. Complete the nuclear chemical equation below so that it describes this nuclear reaction. 24 4 ____ ---> Na + He 11 2

The table below lists information about two common types of nuclear radiation. Fill in the missing information. Note: round masses to the nearest atomic mass unit (u). name matter or energy? mass(u) charge(e) can be stopped by gamma energy 0 0 _____________ matter _______ energy 0 -1 _____________ matter

The table below lists information about two common types of nuclear radiation. Fill in the missing information. Note: round masses to the nearest atomic mass unit (u). name matter or energy? mass(u) charge(e) can be stopped by _______ energy 0 0 _____________ matter alpha energy 4 +2 _____________

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