Question

Match the following.

• A. A-IV, B-III, C-I, D-II
• B. A-II, B-III, C-IV, D-I
• C. A-III, B-IV, C-I, D-II
• D. A-III, B-I, C-IV, D-II

Hint:

Lanthanoids and actinoids belong to the \(f\)-block, transition metals belong to the \(d\)-block.

Answer 1

The Correct Option is D

Step 1: Identify Hafnium.
Hafnium (\(Hf\), \(Z=72\)) belongs to transition elements. \[ Hf \rightarrow d\text{-block} \] \[ A\rightarrow III. \]

Step 2: Identify Radium.
Radium belongs to Group 2. \[ Ra \rightarrow s\text{-block} \] \[ B\rightarrow I. \]

Step 3: Identify Americium.
Americium is an actinoid. \[ Am \rightarrow f\text{-block} \] \[ C\rightarrow IV. \]

Step 4: Identify Astatine.
Astatine belongs to halogens. \[ At \rightarrow p\text{-block} \] \[ D\rightarrow II. \] Thus, \[ \boxed{A-III,\ B-I,\ C-IV,\ D-II} \]