While temperature must be kelvin, the units for volume and pressure don't matter. why is this?

I think because they are under same conditions that's why they don't considered.

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.

No because it not possibly