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cannot be broken down into simpler subst...

___ cannot be broken down into simpler substances.

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An element cannot be broken down into simpler substances.
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{:(, "column"-I,, "column-II"),((a) ,"the peoperty of metal that allows it tio be drawn into wire", (p) ,"Element"),((b),"A single particle composed of two or more identical atoms " ,(q),"Physical property "),((c ) , "A Property that can be observed without changing the chemical formula of substance",(r),"Molecule"),((d),"A subshell that cannot be broken down into simple substances",(s),"Ductility"),(,,(t),"Malleability"):}

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