The electronic configuration of metal a is 2 8 18 1 some metal a when exposed to air and moisture forms BA screen layered compound a with concentrated H2 s o4 forms c and along with water d is a gaseous compound find a b c and d
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Copper when exposed to air form CuCO3.Cu(OH)2. Cu with conc.H2SO4 forms CuSO4 and SO2.
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