Question

covalent compounds have low melting and boiling point then why does lithium have high melting and boiling point?

Answer 1

Because lithium is an ionic compound?

Answer 2

Answer:

Covalent compounds have low melting and boiling points because they are made up of electrically neutral molecules. So, the force of attraction between the molecules of a covalent compound is very weak.

Explanation:

Only a small amount of heat energy is required to break these weak molecular forces. That is why covalent compound have low melting boiling points.

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