NEET 2026 (Phase 1) · ChemistryOxide naturePrevious Year Question
The correct order of increasing metallic character of \ce{Na}, \ce{Be}, \ce{P}, \ce{Mg} and \ce{Si} is:
- A.$\text{P} < \text{Si} < \text{Be} < \text{Mg} < \text{Na}$✓
- B.$\text{P} < \text{Si} < \text{Na} < \text{Mg} < \text{Be}$
- C.$\text{P} < \text{Mg} < \text{Be} < \text{Si} < \text{Na}$
- D.$\text{Be} < \text{Si} < \text{P} < \text{Mg} < \text{Na}$
Correct Answer
(A) $\text{P} < \text{Si} < \text{Be} < \text{Mg} < \text{Na}$
Solution & Explanation
\textbf{Answer:} (A) $\text{P} < \text{Si} < \text{Be} < \text{Mg} < \text{Na}$ \textbf{Solution:} Metallic character decreases from left to right across a period and increases down a group; it varies inversely with electronegativity. Using approximate Pauling electronegativities $\text{Na } 0.9 < \text{Mg } 1.2 < \text{Be } 1.5 < \text{Si } 1.8 < \text{P } 2.1$, the increasing order of metallic character (least to most metallic) is $\text{P} < \text{Si} < \text{Be} < \text{Mg} < \text{Na}$.
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