The reactions listed below are either chemical reactions or nuclear reactions. Which are nuclear reactions? Check all that apply. H^++OH^-arrow H_(2)O (}_{79)^185Auarrow _(77)^181Re+_(2)^4He 4Fe+3O_(2)arrow 2Fe_(2)O_(3) (}_{84)^210Poarrow _(82)^206Pb+_(2)^4He

To determine which reactions are nuclear reactions, let's analyze each reaction:1. - This reaction involves the combination of hydrogen ions and hydroxide ions to form water. It is a chemical reaction, not a nuclear reaction.2. - This reaction depicts the decay of gold-185 into rhenium-181 and helium-4. It is a nuclear reaction involving the emission of an alpha particle.3. - This reaction involves the combination of iron and oxygen to form iron oxide. It is a chemical reaction, not a nuclear reaction.4. - This reaction represents the decay of polonium-210 into lead-206 and helium-4. It is a nuclear reaction involving the emission of an alpha particle.Based on the analysis:- Nuclear reactions: and Therefore, the nuclear reactions are: 【Answer】: and