Copper (I) and `d^(10)` configuration, while copper (II) has `d^9` configuration. Still Copper (II) is more stable in aqueous solution than Copper (I) Why?

Give the electronic configuration of copper (Z = 29).

Aqueous copper sulphate solution gives: a green precipitate with aquous potassium fluoride.

Aqueous copper sulphate solution gives: a bright green solution with aquous KCI Explain there experimental result.

Though copper, silver and gold have completely filled set of d-orbitals yet they are considered as transition metals. Why?

Why does the colour of copper sulphate solution change when an iron nail is dipped in it?

Samples of four metals A,B,C and D were taken and added to the following solutions one by one.The results obtained have been tabulated as follows. Use the table above to answer the following questions about metals A,B,C and D. (i)Which is the most reactive metal? (ii)What would you observe if B is added to a solution of copper (II) sulpahate? (iii)Arrange the metals A,B,C and D in the order of decreasing reactivity.

Why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction?