A common characteristic between zinc and the other transition elements is the ability to

1. Analyze the question

The question asks for a property that zinc shares with other transition elements. To answer this, we must recall the definition of transition elements and the unique electronic configuration of zinc.

2. Explain the concept

• Transition Elements: By definition, a transition element is an element that has an incomplete $d$-subshell in its neutral state or in at least one of its common oxidation states.
• Zinc ($Zn$): Zinc has an electronic configuration of $[Ar] 3d^{10} 4s^2$. Even in its common oxidation state ($Zn^{2+}$), its configuration is $[Ar] 3d^{10}$. Because its $d$-subshell is completely filled, zinc is technically not a transition element according to the strict IUPAC definition.
• Comparison: • Variable oxidation states: Most transition metals exhibit multiple oxidation states (e.g., $Fe^{2+}, Fe^{3+}$). Zinc only exhibits $+2$. • Coloured ions: Transition metals form coloured ions due to $d-d$ transitions. Because zinc has a full $d$-subshell, it cannot undergo $d-d$ transitions, so its ions are colourless. • Catalytic activity: Transition metals act as catalysts due to their variable oxidation states and ability to provide surface area. Zinc is generally not considered a good catalyst compared to metals like $Fe, Ni,$ or $V$. • Complex ion formation: Both transition metals and zinc have the ability to form complex ions (coordination compounds) by donating lone pairs of electrons into empty orbitals (e.g., $[Zn(NH_3)_4]^{2+}$).

3. Show the solution

• Option A: Incorrect. Zinc only shows a $+2$ oxidation state.
• Option C: Incorrect. Zinc does not possess the variable oxidation states required for typical transition metal catalysis.
• Option D: Incorrect. Zinc ions ($Zn^{2+}$) are colourless because the $3d$ subshell is full.
• Option B: Correct. Despite not being a "true" transition metal, zinc shares the ability to form stable complex ions with transition metals because it has empty $4s$ and $4p$ orbitals available for coordinate bonding.

4. Identify the answer

The correct option is B.

5. Exam Tip

When you see a question about zinc in the context of transition metals, always remember the "Zinc Exception": Zinc is the "odd one out" because it lacks variable oxidation states, coloured ions, and catalytic properties. However, it behaves like a transition metal specifically in its ability to form complex ions.