This document discusses electrical engineering materials and their atomic and electronic structures. It introduces the importance of understanding materials for engineers and how man discovered various balanced materials throughout history. It then explains atomic structure, noting that all atoms consist of a central nucleus surrounded by orbital electrons and that protons are positively charged, neutrons are neutral, and electrons are negatively charged. It also discusses atomic numbers, weights, and how atoms behave in solids versus as single isolated atoms.

1. ELECTRICAL ENGINEERING
MATERIALS
MR. ASIF L. JAMADAR

2. INTRODUCTION
 Each field of Engineering has vital concern with material.
 Engineer must understand the basic atomic structure.
 Man discovered a variety of balanced materials.
 A great stage of development of man was the discovery that………
 The glazing technique was developed in 4000 B.C.
 Native copper was used for ornaments, knives, and agricultural implements.
 The material used by 19th century engineers for making the machines and
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3. ATOMIC & ELECTRONIC STRUCTURE
 All atoms consists of a central nucleus surrounded by one or more orbital
electrons.
 Proton has unit positive charge, neutron has electrically neutral & electrons
has negative charge.
 Atomic structure of Hydrogen, Helium, Lawrencium
 Atomic Number of the element
 Atomic Weights (M) 3

4.  When atoms form solids…….
 Atomic Electrons in single atoms:
 Behavior in single isolated items (miniature
solar system)
 Model of Hydrogen atom
 Model of Helium atom
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5.  Model of Aluminium atom
 Attraction between electrons and nuclei
 Electronic structure
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6. THANK
YOU
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7. THANK
YOU
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