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Lecture notes 6

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This document is an instructional resource, designed as a guided introduction to a new academic subject. It functions as a structured set of lecture notes intended to accompany and reinforce classroom learning. The material is organized to build foundational knowledge progressively. It begins by defining the core subject of study and establishing a critical framework for understanding it, often by introducing dual or multi-level perspectives. From there, it systematically develops the key classification systems and specialized language used within the field to describe and differentiate its fundamental components.

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Institution
University Of The Witwatersrand (wits)
Course
Chemistry (CHEM1048A)

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Chem 1048A
BHSc
Learning Goal 6:
Chemical Bonding
(Attendance at lectures is necessary to complete these notes)



Ms Brankin
Office 303
(011) 717-6729


, Bonding Theories
• Lewis structures (1916)

• VSEPR Theory (1958)

• Valence Bond Theory (1927)

• Molecular Orbital Theory (1928)

, Lewis Symbols
• The electrons involved in bonding are called
valence electrons.
• A simple way of showing the valence electrons and
tracking them during bond formation uses Lewis
symbols, or Lewis electron-dot symbols.
• We represent the valence electrons as dots around
the symbol for the element.

or

, Lewis Symbols
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Chemistry (CHEM1048A)
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