David Young

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2012 topic 7.1

2012 topic 7.2

Particle physics - Standard Model

2012 15 1 and 15 2

2012 15 3 and 15 4

5 3 and 5 4

E1 Introduction to the Universe

Lesson : Enthalpy and Calorimetry

2012 topic 4.2 vsepr theory

2012 topic 4.1 bonding - metallic

Ppt djy 2011 1 topic 7 atomic structure sl intro

Ppt djy 2011 2 topic 7 and 13 nuclear reactions

2012 topic 4.1 bonding - covalent

2012 topic 4.1 bonding - ionic

Basic Atomic Structure