Flashcard on Alpha Decay

Front

What is alpha decay?

Back

Alpha decay is a type of radioactive decay in which an unstable nucleus emits an alpha particle (2 protons and 2 neutrons), resulting in a new element with a lower atomic number.

Front

What is an alpha particle?

Back

An alpha particle is a type of subatomic particle consisting of 2 protons and 2 neutrons, identical to a helium nucleus, emitted during alpha decay.

Front

What is the effect of alpha decay on atomic mass?

Back

Alpha decay decreases the atomic mass of the original element by 4 units.

Front

What is the effect of alpha decay on atomic number?

Back

Alpha decay decreases the atomic number of the original element by 2, resulting in a new element.

Front

What is the range of alpha particles in air?

Back

Alpha particles have a very short range in air, typically only a few centimeters, due to their relatively large mass and charge.

Front

How does alpha decay compare to beta decay?

Back

Alpha decay involves the emission of an alpha particle, while beta decay involves the conversion of a neutron into a proton (or vice versa) and the emission of a beta particle (electron or positron).

Front

What is the significance of half-life in radioactive decay?

Back

Half-life is the time required for half of the radioactive nuclei in a sample to decay, providing a measure of the stability of the isotope.

Front

What type of elements typically undergo alpha decay?

Back

Heavy elements, such as uranium and radium, typically undergo alpha decay due to their unstable nuclei.

Front

What is a common application of alpha decay in medicine?

Back

Alpha decay is used in targeted alpha therapy (TAT) for cancer treatment, where alpha-emitting isotopes are used to destroy cancer cells.

Front

What safety precautions are necessary when handling alpha-emitting materials?

Back

Safety precautions include using gloves, protective clothing, and working in a well-ventilated area, as alpha particles can be harmful if ingested or inhaled.