Question

Nickel (Z = 28) combines with a uninegative monodentate ligand X⁻ to form a paramagnetic complex [NiX₄]²⁻. The number of unpaired electron(s) in the nickel and geometry of this complex ion respectively are ______.

Options

• one, tetrahedral

• two, tetrahedral

• one, square planar

• two, square planar

Answer 1

Nickel (Z = 28) combines with a uninegative monodentate ligand X⁻ to form a paramagnetic complex [NiX₄]²⁻. The number of unpaired electron(s) in the nickel and geometry of this complex ion respectively are two, tetrahedral.

Explanation:

The formation and geometry of [NiX₄]²⁻ are as follows:

The complex has a tetrahedral shape and two unpaired electrons, making it paramagnetic.