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1. Metals
2. Nonmetals
3. Metalloids

Semi-conductor

Malleable

Lusterous

Usually gas or liquid

Low melting point

Brittle

Conducts heat

Found on zig-zag line

Conducts electricity

Usually solid

Properties of metals

Shiny

Most are right of zig-zag line

Dull

Left of the zig-zag line

Insulator

Ductile

Properties of nonmetals