Column A

Question

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

Answer 1

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