Question

A) The breaking of chemical bonds

B) physical changes in Atoms
C) Chemical reactions
D) The nuclei of unstable isotopes

Question, where does radioactivity come from?

Answer 1

D) The nuclei of unstable isotopes

Step-by-step explanation:

For example, the carbon-14 in carbon dating is radioactive.

When it decays, a neutron in the nucleus is converted into a proton, an electron, and an antineutrino.

`_(0)^(1)\text{n} \longrightarrow \, _(1)^(1)\text{p} + \, _(-1)^(0)\text{e} + \overline{\\u}_{\text{e}}`