Question

Define boiling point and melting point of group 18 elements

Answer 1

The Atomic and Physical Properties. Atomic mass, boiling point, and atomic radii INCREASE down a group in the periodic table.Down Group 18, atomic radius and interatomic forces INCREASE resulting in an INCREASED melting point, boiling point, enthalpy of vaporization, and solubility.
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Answer 2

The first ionization energy DECREASES down a group in the periodic table. Down Group 18, atomic radius and interatomic forces INCREASE resulting in an INCREASED melting point, boiling point, enthalpy of vaporization, and solubility. The INCREASE in density down the group is correlated with the INCREASE in atomic mass.

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