ENMA Midterm questions

ENMA Midterm questions - ENMA Midterm questions: 1. Name...

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ENMA Midterm questions: 1. Name three major classes of materials Polymers, ceramics, metals B) Name four major properties of metals: Mechanical, thermal, optical, magnetic 2) Describe characteristics of clay as a material Hard, head resistant b) what were the advances in society allowed by clay? Mass storage of grains allowed for trade, surplus and agriculture society 3) what are the seven metals of antiquity? In order gold, copper, silver, lead, tin, iron, mercury 4) discuss a possible scenario for the discovery of copper smelting and what was important about the discovery? -If malachite was found it could be smelted and the charcoal would extract the oxygen from the carbon atom which would leave pure copper. This was important because it allowed pure copper to be extracted from materials and mixed with tin to create bronze. Define: Intersitial defect or impurity: -This is when an atom is between other atoms and is not in a lattice site. It is smaller and between lattice sites. Metallic Bonding:
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ENMA Midterm questions - ENMA Midterm questions: 1. Name...

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