A silver article turns black when kept in open for a few days and it again start shining when rubbed with toothpaste why do silver articles turn black when kept in open for few days name the phenomenon involved name the black substance formed and give its chemical formula
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the silver articles trun black because it is kept in contact with air by the result rust is formed on it. The process involved is corrosion (rusting).
the black substance formed is iron oxide.(Ferrus oxide)
Fe+O2(oxygen)=>FeO
hope my answer helped you.
the black substance formed is iron oxide.(Ferrus oxide)
Fe+O2(oxygen)=>FeO
hope my answer helped you.
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