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The electronic configuration of metal A ...

The electronic configuration of metal A is 2,8,18,1.
The metal A when exposed to air and moisture forms B a green layered compound. A with conc. `H_2SO_4` forms C and D along with water . D is a gaseous compound. Find A , B, C and D .

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(i)The electronic configuration of metal (A) is 2, 8, 18, 1…. A is copper (Z=29)
(ii) (A) Copper exposed to air and moisture forms green layered compound (B) that is copper carbonate.
`underset"(A)"(2Cu)+O_2 +CO_2 + H_2O to CuCO_3 .underset"(B)"(Cu(OH)_2)`
(iii) Copper (A) reacts with conc.`H_2SO_4` to give copper sulphate (C ) and Sulphur dioxide (D).
`underset"(A)"(Cu)+conc. 2H_2SO_4 to underset"(C )"(CuSO_4) + underset"(D)"(SO_2) + 2H_2O`
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