Which equation shows a physical change?

pb(no3)2 (aq) + 2ki(aq) _ 2kno3(aq) + pbi2(s)

hcl(aq) + naoh(aq) _ nacl(aq) + h2o(l)

2h2o(l) _ 2h2(g) + o2(g)

h2o(g) _ h2o(s)

Time remaining 58: 10 an atom that has 84 protons and 86 neutrons undergoes a reaction. at the end of the reaction, it has 82 protons and 84 neutrons. what happened to the atom? it accepted radiation in a chemical reaction it donated neutrons to another atom in a chemical reaction it emitted an alpha particle in a nuclear reaction. it accepted protons in a nuclear reaction. mark this and retum save and exit next submit