Edexcel IGCSE Chemistry 1c Ratios Fractions Percentages Powers and Roots Topic Practice

Pearson Edexcel International GCSE Chemistry (4CH1)

1 Principles of chemistry

(a) States of matter

(b) Elements, compounds and mixtures

(c) Atomic structure

(d) The Periodic Table

(e) Chemical formulae, equations and calculations

(f) Ionic bonding

(g) Covalent bonding

(h) Metallic bonding

(i) Electrolysis

2 Inorganic chemistry

(a) Group 1 (alkali metals) – lithium, sodium and potassium

(b) Group 7 (halogens) – chlorine, bromine and iodine

(c) Gases in the atmosphere

(d) Reactivity series

(e) Extraction and uses of metals

(f) Acids, alkalis and titrations

(g) Acids, bases and salt preparations

(h) Chemical tests

3 Physical chemistry

(b) Rates of reaction

(c) Reversible reactions and equilibria

4 Organic chemistry

(a) Introduction

(f) Carboxylic acids

(h) Synthetic polymers

5 Experimental skills

Problem-solving and application

Investigation planning and methods

Observations, measurements and variables

Analysis, communication and evaluation

6 Mathematical skills

1 Arithmetic and numerical computation

1A Decimal-form numbers

1B Standard-form numbers

1C Ratios, fractions, percentages, powers and roots

2 Handling data

Question Bank/IGCSE Edexcel Chemistry/6 Mathematical skills/1 Arithmetic and numerical computation/1C Ratios, fractions, percentages, powers and roots

Question typeDifficulty