What kind of change is a change in state of matter and why
Physical or chemical

physical

Explanation:

Common changes of state include melting, freezing, sublimation, deposition, condensation, and vaporization. I hope this helps. :)

water is used to store them because it would keep the radiation from getting out in the open and causing harm to the workers

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).