Chemistry · Periodic Classification
Which statement best explains why Lithium (Li) behaves less metallic than Sodium (Na), despite being in the same alkali metal group?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Li is heavier and its valence electron is more easily removed compared to Na.
- 2Li has a larger atomic radius and lower effective nuclear charge than Na.
- 3Li's outer valence electron experiences a significantly stronger shielding effect than Na's.
- 4Li has a smaller atomic radius and higher ionization enthalpy than Na.✓
Correct answer
Li has a smaller atomic radius and higher ionization enthalpy than Na.
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