WHAT IS METAL???
•A metal is a chemical element that is a good conductor of both electricity and heat and forms cations and ionic bonds with non-metals.
•In chemistry, a metal is an element, compound , or alloy characterized by high electrical conductivity. In a metal, atoms readily lose electrons to form positive ions (cations). Those ions are surrounded by delocalized electrons, which are responsible for the conductivity. The solid thus produced is held by electrostatic interactions between the ions and the electron cloud, which are called metallic bonds
•A metal is a chemical element that is a good conductor of both electricity and heat and forms cations and ionic bonds with non-metals.
•In chemistry, a metal is an element, compound , or alloy characterized by high electrical conductivity. In a metal, atoms readily lose electrons to form positive ions (cations). Those ions are surrounded by delocalized electrons, which are responsible for the conductivity. The solid thus produced is held by electrostatic interactions between the ions and the electron cloud, which are called metallic bonds
From Wikipedia
Mechanical Properties
•Metals exhibit elastic as well as plastic behavior, both of which are necessary for the forming process.
ELASTICITY
•Describe the recovery of material back to its original shape and size after being deformed, when a stress is removed.
TENSILE STRENGTH
Is the maximum tensile (pulling apart) load that a material can withstand prior to fracture
HARDNESS
•Is the ability of a material to withstand penetration and scratching. Hardness and brittleness are related.
BENDING
Is characterized by the outside fibers of a beam in tension and the inside fibers in compression
OPACITY/ TRANSPARENCY
•Is the ability to transmit light
MELTING POINT
•Is the energy required to separate a material’s atom, changing its state from solid to liquid.
2 types of metal
- ferrous metal - metals that contain ion
- non-ferrous metal - metals that do not contain ion
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