Giving two reasons, classify air as a mixture or compound.

1.) Air can be separated into its constituents such as oxygen, nitrogen etc.

2.) Air has a variable composition because at different places different amount of gases are present in air.

The answer is b i think

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.