Which of the following elements has the lowest melting point? (1) Sodium (2) Tin (3) Radon (4) Radium

Which of the following elements has the lowest melting point? (1) Sodium (2) Tin (3) Radon (4) Radium
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(3) Radon Explanation: Among the given elements, Radon has the lowest melting point of-71° Celsius. The melting point of other elements are as follows: Sodium: 98° C; Tin 232° C; Radium: 700°C
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