Which sequence is an example of radioactive decay? o the nuclei of two hydrogen atoms fuse together, forming a helium nuclide. o a calcium atom gives its electrons to two fluorine atoms, forming a formula unit of calcium fluorideo apolonium isotope becomes a lead isotope when the polonium nuclide emits two protons and two neutrono energy from an electric current splits a water molecule into two hydrogen atoms and one oxygen atom

Apolonium isotope becomes a lead isotope when the polonium nuclide emits two protons and two neutron. - third choice

It is the third choice  - the radioactive decay of apolonium isotope.

Explanation:

Radioactive decay happens when an atom emits subatomic particles and forms another element. The amount of the radioactive element decreases as the decay progresses over time.

1. they vary with a higher number because boiling is way hotter than melting