Question:
Which of the following metals possesses the highest melting point?
Which of the following metals possesses the highest melting point?
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Melting points generally decrease down a group for alkali metals, because there is greater electron shielding, and weaker metallic bonding. There are no strong or weak covalent bonds between metals, instead, the metal atoms share a “sea of electrons”, so metals with strong metallic bonds have high melting points.
Updated On: Jan 17, 2026
- Sodium (Na)
- Lithium (Li)
- Potassium (K)
- Cesium (Cs)
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The Correct Option is B
Solution and Explanation
Among the alkali metals, lithium has the highest melting point due to its small atomic size and strong metallic bonding. The melting point trend in Group 1 elements decreases as atomic size increases, weakening the metallic bonds. Therefore, the order of melting points is:
• Lithium (Li): Highest melting point
• Sodium (Na)
• Potassium (K)
• Cesium (Cs): Lowest melting point
This trend highlights the relationship between atomic size and bond strength in metallic structures.
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