Q. 55.0( 2 Votes )
a) Cu2+ = 1s2 2s2 2p6 3s2 3p6 3d9
b) Yes. Because in d-block elements there is very small energy difference between the outer most s subshell and the penultimate d subshell. Hence under suitable conditions, the electrons of d subshell also take part in chemical reactions. So, Cu shows variable valency.
Cu shows +2 oxidation state and Cl shows -1 oxidation states in the chemical reaction so when these two elements will react then the chemical formula will be CuCl2.
Rate this question :