Worksheet: Alpha Decay
In this worksheet, we will practice solving nuclear equations involving alpha decay.
How many neutrons does an alpha particle have?
How many protons does an alpha particle have?
When a nucleus emits an alpha particle, by how much does the mass number of the remaining nucleus decrease?
What is the relative charge of an alpha particle?
The following nuclear equation shows how an isotope of uranium decays to thorium: What is the value of in the equation?
Which of the following statements correctly describes the process of alpha decay?
- AIf a heavy unstable nucleus has too many protons, a proton may decay into a neutron, releasing a high-energy electron from the nucleus.
- BIf a heavy unstable nucleus has too many nucleons, 2 protons may be ejected from the nucleus.
- CIf a heavy unstable nucleus has too many nucleons, 2 protons and 2 neutrons may be ejected from the nucleus.
- DIf a heavy unstable nucleus has too many neutrons, a neutron may decay into a proton, releasing a high-energy electron from the nucleus.
- EIf an unstable nucleus has too many neutrons, one or more neutrons will be ejected from the nucleus.
|Number of Protons||86||87||88||89||90||91||92|
Thorium can undergo alpha decay. Which of the elements listed in the table does a thorium nucleus become when it undergoes alpha decay?
Which of the following is the correct symbol for an alpha particle?
The graph shows an isotope of uranium undergoing alpha decay. The number of protons of the isotope is shown on the -axis, and the number of neutrons of the isotope is shown on the -axis.
Which isotope of uranium does the graph show?
Which isotope does the uranium become?