OCR(A) AS Chemistry Student Unit Guide: Unit F321 Atoms, Bonds and Groups

Summary:
Student Unit Guides are perfect for revision. Each guide is written by an examiner and explains the unit requirements, summarises the relevant unit content and includes a series of specimen questions and answers.

There are three sections to each guide:

Introduction - includes advice on how to use the guide, an explanation of the skills being tested by the assessment objectives, an outline of the unit or module and, depending on the unit, suggestions for how to revise effectively and prepare for the examination questions.

Content Guidance - provides an examiner's overview of the module's key terms and concepts and identifies opportunities to exhibit the skills required by the unit. It is designed to help students to structure their revision and make them aware of the concepts they need to understand the exam and how they might analyse and evaluate topics.

Question and Answers - sample questions and with graded answers which have been carefully written to reflect the style of the unit. All responses are accompanied by commentaries which highlight their respective strengths and weaknesses, giving students an insight into the mind of the examiner.

• A revision guide specifically written to meet the requirements of the unit
  

• Written by an examiner with commentary on key points and concepts 
  

• Features specimen questions and answers, together with examiner's comments
  

Table of Contents:
Introduction
About this guide
Study skills and revision techniques
Approaching the unit test
Content Guidance
About this section
Atoms and reactionsAtomic structure
Moles and equations
Calculation of reacting masses, mole concentrations and volumes of gases
Acids
Redox
Electrons, bonding and structure
Electronic structure of atoms
Chemical bonding and structure
Bonding and physical properties
The periodic table
Periodicity
Group 2
Group 7
Questions and Answers
About this section
Q1 Isotopes; electron configuration; ionisation energy
Q2 Moles; test for a halide; decomposition of carbonates
Q3 Oxidation and reduction; bonding and structure
Q4 Electronegativity; hydrogen bonding
Q5 Group 7; empirical formulae; shapes of molecules
Q6 Ionisation energies
Q7 Bonding
Q8 Trends in atomic radii
Q9 Group 2
Q10 Shapes of molecules
Q11 Electrical conductivity