Do compounds of radioactive elements show a different behaviour? What happens when the radioactive part of the given compound decays? e.g. Radium chloride; what happens to it when radium decays?
Answer
During the nuclear reaction, the atomic number Z (and therefore chemical identity) changes (transmutation). In your example, $\ce{RaCl_2 -> \alpha^{2+} + RnCl_2^{2-} -> He + RnCl_2}$.
Radon being noble gas would react further, e.g. $\ce{RnCl_2 -> Rn + Cl_2}$
If the decaying atom would be a transition metal with ligands, it's properties should not change so drastically so that the ligands will stay attached.
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