Hydrochloric acid used to wash copper 1 oxide

C: plants and animals

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.

Ametal with a large number of free flowing electrons most likely has good conductivity

Answer (b) supersaturation;