Exam 21: Nuclear Chemistry

What is the nuclear binding energy per nucleon, in joules, for (atomic mass 24.985839 amu). [Data: (atomic mass)= 1.007825 amu; (mass)= 1.008665 amu; 1 kg = 6.022 * 10²⁶ amu; c = 3.00 * 10⁸ m/s]

When a ⁸⁷Br nucleus emits a beta particle, the nuclear species that results is ___________.

Determine how much energy is released when thorium-230 decays according to . [Atomic masses: thorium-230 = 230.033127 amu; helium-4 = 4.002603 amu; radium-226 = 226.025403 amu]

Protactinium-234 has a half-life of 1 minute. How much of a 400. g sample protactinium would remain after 2 minutes?

Complete and balance the nuclear equation .

Thorium-225 undergoes alpha decay. Write a balanced equation for this reaction.

Calculate the energy released in joules when one mole of polonium-214 decays according to the equation [Atomic masses: Pb-210 = 209.98284 amu, Po-214 = 213.99519 amu, He-4 = 4.00260 amu.]

The heaviest known isotope of hydrogen is called tritium, . It decays by beta emission, and has a half-life of 12.3 years. What fraction of a tritium sample will remain after 5.20 years ?

Predict which nucleus is less stable, or .

The only stable isotope of fluorine is . What type of radioactivity would you expect from the isotope , which has one fewer neutron?

Charcoal samples taken from holes dug at Stonehenge, England, have a carbon-14 specific activity of 9.50 dpm per gram carbon. Living wood has a specific activity of 15.3 dpm per gram of carbon. Given that the half-life of carbon-14 is 5730 yr, how long ago was the wood part of a living plant?

In passing through matter, alpha particles lose energy chiefly by causing

Which one of the following statements about fission and fusion is false?

The energy equivalent of 1 amu is

The blood volume of a patient can be measured by using chromium-51, a positron emitter, administered as a solution of sodium chromate. Write the nuclear equation for the decay of chromium-51.

The rates of radioactive decay processes, like the rates of chemical reactions, are sensitive to temperature changes.

Find the nuclear binding energy of potassium-40 (atomic mass = 39.9632591 amu)in units of joules per nucleon. [Data: neutron mass = 1.674928 * 10^-24 g; proton mass = 1.672623 * 10^-24g; electron mass = 9.109387 * 10^-28 g; N_A = 6.0221367 * 10²³ /mol; c = 2.99792458 * 10⁸ m/s]

Predict the other product of the following nuclear transformation.

On a neutron number versus proton number plot, the nucleus of oxygen-15 lies below the belt of stability. Write an equation for radioactive decay of oxygen-15.

The isotope with the greatest nuclear binding energy per nucleon is