Match the word to its definition/description.

Column A
1.
Radioactivity:
Radioactivity
2.
Radioisotope:
Radioisotope
3.
Isotope:
Isotope
4.
Radiation:
Radiation

Column B
a.Rays and particles emitted by radioactive materials
b.atoms of the same element with differing numbers of neutrons
c.when a substance spontaneously emits radiation
d.an atom with an unstable nucleus

Column A

1. Radioactivity: c. when a substance spontaneously emits radiation
2. Radioisotope: d. an atom with an unstable nucleus
3. Isotope: b. atoms of the same element with differing numbers of neutrons
4. Radiation: a. Rays and particles emitted by radioactive materials

Sure! Let's match the words to their definitions/descriptions:

Column A
1. Radioactivity: c. when a substance spontaneously emits radiation
2. Radioisotope: d. an atom with an unstable nucleus
3. Isotope: b. atoms of the same element with differing numbers of neutrons
4. Radiation: a. rays and particles emitted by radioactive materials

To match the words to their definitions, you can use the provided descriptions in Column B. Let's go through each word one by one:

1. Radioactivity: This term refers to the natural process by which certain substances (usually containing unstable atomic nuclei) emit particles or rays. To match this definition, you would choose option c: "when a substance spontaneously emits radiation."

2. Radioisotope: A radioisotope is an atom with an unstable nucleus that undergoes decay, emitting radiation in the process. The correct match for this definition would be option d: "an atom with an unstable nucleus."

3. Isotope: Isotopes are atoms of the same element that have different numbers of neutrons. This means they have the same number of protons but different atomic masses. Therefore, the appropriate choice for this definition would be option b: "atoms of the same element with differing numbers of neutrons."

4. Radiation: Radiation refers to the rays and particles emitted by radioactive materials, which could include alpha particles, beta particles, gamma rays, and others. Accordingly, for this definition, you would select option a: "rays and particles emitted by radioactive materials."

By matching the descriptions in Column B with the corresponding terms in Column A, you can determine the correct matches for each word and definition.