Elements can be broadly divided into two categories: metals and non-metals. They differ both in physical and chemical properties.
Metals are malleable. They can be beaten into thin sheets. They are also ductile and can be drawn into wire (except a few metals like Na, K).
Non-metals are neither malleable nor ductile. For example, coal (carbon) and sulphur.
All the metals show metallic lusture.
Non-metals do not show any metallic lusture.
Metals are generally hard.
Non-metals are soft in comparison to metals.
Metals exist in solid and liquid states.
Non-metals exist in solid, liquid and gaseous states.
Metals are sonorous and produce characteristic metallic sound when struck.
Non-metals are non sonorous.
Metals have high density.
Non-metals have low density.
Metals are good conductor of electricity.
Non-metals are bad conductor of electricity.