Periodic Trends

There are a couple of properties of atoms that have characteristic trends. We need to be able to discuss these trends in terms of atomic structure, specifically the forces acting within an atom that affect these properties.

ELECTRONEGATIVITY

1ST IONISATION ENERGY

Atomic Structure - Forces of Attraction and Repulsion

In trying to understand electron configurations and periodic trends, we need to understand the forces inside an atom:

On 2 June, we looked at radius in a bit more detail:

Redox Equations

This year, we need to be aware that some oxidants and reductants make different products depending upon the conditions - acidic, neutral or alkaline.

Redox Introduction

Homework - Suggested Answers

Over the holidays, we have been working on one of the TKI Practice Internal Assessment tasks. These videos talk through the rationale behind the answers.

NOTE: There is an error from 9:15. I forgot to delete a hydrogen atom so the ketone should be: CH3-CH2-C=O-CH3. Sorry!

C-NMR

Infrared Spectroscopy

The first analytical technique we looked at was IR Spectroscopy. The video above goes through the theory of how the graphs are generated. However, for the Internal Assessment, it is more important that we can use the graphs to infer which functional groups are found within an unknown compound: