A horizontal line on a phase change graph indicates
A. a phase change
B. a lot of temperature increase for a little heat
C. no change in potential energy of the molecules
D. a high specific heat

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.