Question

If a label indicated the presence of a radioactive isotope, you would know what

about the substance?

Answer 1

we would know that the substance's atoms have an unstable combination of neutrons and protons or excess energy in their nucleus.

Answer 2

Radioisotopes are radioactive isotopes of an element

Explanation: Radioactive isotopes are detected by: photographic film.

a cloud or bubble chamber.

a liquid scintillation detector.

a Geiger-Muller counter.