Identify the Odd One Out based on periodic table classification:
Correct Answer: Iron (Fe)
Subject: chemistry
- Silicon (Si)
- Germanium (Ge)
- Arsenic (As)
- Iron (Fe)
Explanation: • <b>Key Fact</b>
Iron (Fe) is a transition metal (d-block).
• <b>Supporting Detail</b>
Silicon, Germanium, and Arsenic are metalloids (exhibiting both metallic and non-metallic traits).
• <b>Related Concept</b>
Metalloids appear along the stair-step line in the p-block.
• <b>Why wrong options are wrong</b>
Si, Ge, and As all belong to the metalloid category.
• <b>Exam Trick</b>
Identify the "staircase" elements (B, Si, Ge, As, Sb, Te, Po).
• <b>Additional Info</b>
Iron belongs to Group 8, Period 4.