Which of the following s-block elements has the highest melting point?
Practice Questions
1 question
Q1
Which of the following s-block elements has the highest melting point?
Lithium
Sodium
Potassium
Rubidium
Lithium has the highest melting point among the alkali metals due to its small size and strong metallic bonding.
Questions & Step-by-step Solutions
1 item
Q
Q: Which of the following s-block elements has the highest melting point?
Solution: Lithium has the highest melting point among the alkali metals due to its small size and strong metallic bonding.
Steps: 5
Step 1: Understand that s-block elements include alkali metals (Group 1) and alkaline earth metals (Group 2).
Step 2: Identify the alkali metals: Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr).
Step 3: Recognize that melting points of metals generally decrease as you move down a group in the periodic table.
Step 4: Compare the melting points of the alkali metals: Lithium has a melting point of 180.5 °C, Sodium 97.8 °C, Potassium 63.5 °C, Rubidium 39.3 °C, Cesium 28.5 °C, and Francium is not well-defined but is expected to be lower.
Step 5: Conclude that Lithium has the highest melting point among the alkali metals due to its small atomic size, which leads to stronger metallic bonding.
