Which of the following elements has the highest melting point among the alkali m

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Question: Which of the following elements has the highest melting point among the alkali metals? (2023)

Options:

Correct Answer: Lithium

Exam Year: 2023

Solution:

Lithium (Li) has the highest melting point among the alkali metals due to its smaller size and stronger metallic bonding.

Which of the following elements has the highest melting point among the alkali metals? (2023)

Which of the following elements has the highest melting point among the alkali metals? (2023)

Step 1: Understand what alkali metals are. Alkali metals are found in Group 1 of the periodic table and include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
Step 2: Know that melting point is the temperature at which a solid becomes a liquid.
Step 3: Recognize that among the alkali metals, lithium is the first element in the group.
Step 4: Remember that smaller atoms generally have stronger metallic bonds, which can lead to higher melting points.
Step 5: Compare the melting points of the alkali metals: Lithium has a melting point of about 180.5°C, while the others have lower melting points.
Step 6: Conclude that lithium (Li) has the highest melting point among the alkali metals.

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