Metallic Character
Identify the correct trend of metallic character among period-3 elements Na, Mg, Al and Si:
Select the correct option:
Solution
Na>Mg>Al>Si
Metallic character is the tendency to lose electrons, which is higher when ionization enthalpy is lower. Across a period, effective nuclear charge increases, so electron loss becomes harder and metallic character decreases. Therefore in period 3, Na is most metallic and Si is least among the given elements.
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About This Question
- Subject
- chemistry
- Chapter
- classification of elements and periodicity in properties
- Topic
- metallic character
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Na>Mg>Al>Si
Metallic character is the tendency to lose electrons, which is higher when ionization enthalpy is lower. Across a period, effective nuclear charge increases, so electron loss becomes harder and metallic character decreases. Therefore in period 3, Na is most metallic and Si is least among the given elements.
This medium difficulty chemistry question is from the chapter classification of elements and periodicity in properties, covering the topic of metallic character. It appeared in the 2025 exam.
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