Are the following physical or chemical changes? 16. Weathering: chemical change
17. Deposition:
18. Metamorphism:
19. Melting

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.

Solubility would be your answer.

The se-ci  bonds is more polar  than s-br bond