The characteristic not related to alkali metal is
Show Hint
- high ionisation energy
- their ions are isoelectronic with noble gases
- low melting point
- low electronegativity
The Correct Option is A
Solution and Explanation
Alkali metals are the most electropositive elements in their respective periods.
Step 2: Analysis
They have the largest atomic radii and effectively shield their valence electrons.
Step 3: Ionization Energy
Because they lose their valence electron easily, they possess the minimum (low) ionization energy in their period, not high.
Step 4: Verification
Options (b), (c), and (d) are true characteristics of alkali metals.
Final Answer: (a)
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