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 Form 2 Chemistry questions and answers on structure and bonding

In terms of structure and bonding, explain why the melting point of oxygen is much lower than that of sodium.

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Answer Text:
Oxygen exits as diatomic molecules forming simple
molecular structure. The forces of attraction between the molecules are very weak therefore less energy required to separate them. Atoms of sodium are held by strong metallic bonds. These require a lot of energy to break them.