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Question
Why does the melting point of elements decrease down a group eventhough the density increases?
Why does the melting point of elements decrease down a group eventhough the density increases?
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Solution
As you go down group, however, the atoms become larger so that the positive nucleus gets further away from the negative set of electrons. The force of attraction between the metal ions and the electrons thus gets weaker down the group and the melting points decrease as less heat energy is needed to overcome this weakening force of attraction.
As you go down group, however, the atoms become larger so that the positive nucleus gets further away from the negative set of electrons. The force of attraction between the metal ions and the electrons thus gets weaker down the group and the melting points decrease as less heat energy is needed to overcome this weakening force of attraction.
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