metals and non metal

Introduction

The chapter "Materials: Metals and Non-Metals" introduces the two main types of elements: metals and non-metals. Metals are elements that have a shiny appearance, are malleable (can be hammered into sheets), ductile (can be drawn into wires), and good conductors of heat and electricity. Non-metals are elements that do not have the same properties as metals. They are typically not shiny, not malleable or ductile, and poor conductors of heat and electricity.

Properties of Metals

The following are some of the properties of metals:

  • Lustre: Metals have a shiny appearance. This is because they reflect light well.
  • Malleability: Metals can be hammered into sheets without breaking.
  • Ductility: Metals can be drawn into wires without breaking.
  • Conductivity of heat: Metals are good conductors of heat. This means that they can transfer heat quickly from one place to another.
  • Conductivity of electricity: Metals are good conductors of electricity. This means that they can allow electricity to flow through them easily.
  • Tenacity: Metals have high tensile strength. This means that they can withstand a lot of force before breaking.
  • Sonority: Metals make a ringing sound when struck. This is because they vibrate easily.
  • Density: Metals are generally denser than non-metals. This means that they have more mass per unit volume.
  • Melting point: Metals have high melting points. This means that they need to be heated to a high temperature before they melt.
  • Boiling point: Metals have high boiling points. This means that they need to be heated to a high temperature before they

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