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