The blank is the energy difference between reactants and products in a chemical reaction

The difference between the energy of the reactants and the energy of the products is called the enthalpy change

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.