Answer:
The ion is d^10
Explanation:
Tetrahedral geometry is one in which the central atom/ion is located at the center of four ligands positioned at the corners of a tetrahedron.
It is different from a square planar complex wherein the ligands are positioned at the corners of a square with the central atom/ion at the center of the square.
Tetrahedral complexes are more common with d^10 species.The electronic configuration of Cu I is [Ar]3d104s1. Hence, a tetrahedral geometry is preferred over a square planar geometry.
