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Types of materials Metals and alloys: iron, copper, aluminium, steel. Structure of metals: The atoms in metals are closely packed; they fit as many atoms as they can in one bulk of metal. Each atom is attached to 6 other atoms in its outer layer e.g. Composition: Metals are composed of atoms and in those atoms there are Electrons, Protons and Neutrons, in every atom there usually are the same number of neutrons and electrons, but the numbers of protons differ as some atoms have one more proton then electrons and neutrons. E.g. iron Properties: Chemical properties: They have 1-4 atoms in their outer shell. They loose electrons easily (low ionisation potential) They give away their electrons easily (reducing agents) They have hydroxides that react as both weak acids and bases (amphoteric). They have the tendency to loose electrons than gain them. (Electropositive). 82 elements in the periodic table may be classed as metals. Physical properties 1. They...

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