they have different melting points and specific heat
No, while it is possible to melt manganese it is a solid at room temperature
Yes.
No. But by lowering its temperature or the pressure, its phase can be changed.
It is not possible. You call the substance a solid if it is so at room temperature. It is not possible for a solid (at room temperature) to also be as a liquid at room temperature.
temperature. The higher the temperature of the liquid, the more of the solid you can dissolve in it.
Yes, at room temperature and pressure calcium is a solid.
Sucrose can be both solid or liquid. At room temperature, however, it's a solid.
temperature. The higher the temperature of the liquid, the more of the solid you can dissolve in it.
It depends on the temperature. For instance, Mercury is a liquid at room temperature. Gold is solid at room temperature.
The temperature at which a pure solid changes to a liquid is the substance's melting point.
Any liquid can turn into a solid at the correct temperature.
Titanium is a solid at room temperature.