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Metals -
1. they are malleable (they can be beaten into sheets)
2. they are ductile (they can be converted into thin wires)
3. they posses a metallic lustre (metallic shine/glaze)
4. they are usually harder than non metals(except Na)
5. they are Electropositive in nature (they donate electrons)
6. their oxides are usually basic (except Pb, K, etc, which are amphoteric)
7. they posses very low resistivity.
8. they are good conductors of heat n electricity.
9. none of them are inert.

Non metals -
1. they are brittle.
2. they are not ductile.
3. they don't have too much of a lustre. (except diamond and iodine)
4. they are mostly a little softer (except diamond)
5. they are electronegative in nature.
6. All of their oxides are basic.
7. they have high resistivity.
8. they are good insulators of electricity n heat (except graphite)
9. many of them are inert. ( He, Xe, Ne, Kr, Ar, etc)