3.2.5.1 General properties [of transition metals] (A-level only)

Which is not a correct statement?

• Transition metals form coloured ions and complexes

• Transition metals display variable oxidation states

• A ligand accepts a pair of electrons from a transition metal

• A complex is a central metal atom or ion surrounded by ligands

What is the electron configuration of Cu²⁺?

• [Ar]3d⁹4s²

• [Ar]3d¹⁰4s¹

• [Ar]3d⁹

• [Ar]3d¹⁰

Which one of the following could not act as a ligand?

• F⁻

• CH₃CH₃

• NH₂NH₂

• CH₃OCH₃

Which of the species given below can behave as ligands?

NH₂^- NH₃ NH₄⁺

• all three

• only NH₃

• NH₃ and NH₄⁺

• NH₂^- and NH₃

Which one of the following electronic configurations is that of a transition element?

• [Ar] 4s²3d¹⁰

• [Ar] 4s²3d⁹

• [A] 4s²3d⁰

• [Ar] 4s²3d¹⁰4p¹