Mass doesn't change when the temperature of the ball changes. (Unless, of course, it gets so hot that it melts, and part of it falls off and rolls under the table.)
Nothing it will turn into a liquid and it will not weigh anything
The mass of a metal ball does not change when it is heated; it remains constant under normal conditions. Although heating increases the motion of the atoms, leading to thermal expansion, the overall mass stays the same. Any change in mass due to energy gained from heat is negligible and not typically observable in practical situations.
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