How density and melting point vary down a group?
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Though there are exception, such questions are dealt by speaking in general.
In general, density increases down the group, because the increase in mass is rapid that increase in volume,
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In general, melting point decrease down the group. because hardness decreases down the group
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Answer:Density increases down the group as atomic radius increases down the group
While that of melting and boiling point decreases down the group
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