if a student is investigating liquids, which of the following pieces of safety equipment is not necessary?

Wyyeurudydudyeye2y3y3y3ueuudisusuisus7w7uwh2u

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.