How do the particles behave in the reaction between iron and sulphur?
The iron atoms absorb enough energy to lose three electrons each and become iron(III) ions. The octa-atomic sulphur molecules absorb enough energy to become sulphur atoms. [ These atoms each gain two electrons to become sulphide ions with a -2 charge each. Since electrons are conserved, 1½ times as many sulphur atoms so react as do iron atoms. These ions now form a solid and give up energy. The
overall process gives up energy (enough so that some of the solid goes off as a smoke). source; yahoo ]
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