Copper forms two chlorides CuCl and
Atomic number of copper (Cu) = 29.CuCl2
(1) The copper ions in the CuCl and CuCl2 compounds are
CuCl − Cu+
(2) The valance of copper in
CuCl is 1
(3) Electronic configuration
Cu (29)− 1s22s22p63s23p63d104s1.
In the case of CuCl electron is lost from 4s orbital.
In the case of CuCl2 electron is lost from 4s orbital and another electron is lost from 3d orbital.
The electronic configuration of Cu2+ is 1s22s22p63s23p63d9
(4) Copper (Cu) belongs to 4th period and 11th group in the periodic table.