Chemistry

Welcome to Chemistry keypoint page. Revision notes for your Chemistry O-Level exams like WAEC, JAMB, NECO, and NABTEB.

Definition of Chemistry

Branches of Chemistry

Reasons why we study chemistry

Definition of Matter

States of matter

Properties of Matter

Difference Between Chemical and Physical Changes

Definition of Element

Definition of a Compound

Features/Characteristics of a Compound

Definition of a Mixture

Features/Characteristics of Mixtures

Differences Between Compound and Mixture

Types of Separation Techniques

Definition of Atom

Definition of Molecule

Definition of Ion

Definition of Radical

First Twenty Elements

What is Relative atomic mass

What is Relative Molecular Mass

What is Molar mass

Definition of Mole

Moles Calculation

Laws of Chemical Combination

Definition of valency

Dalton’s Atomic Theory

Criticisms of Dalton’s Atomic Theory

Structure of an Atom

Quantum Number

Arrangement of Electrons in an Atom

Isotopy

Periodic Table

Periodic Trends

Chemical Combination Meaning

Electrovalent Bonding

Covalent Bonding

Metallic Bonding

Hydrogen Bonding

Vander Wail Forces

Three States of Matter

Kinetic Theory of Gases

Boyle’s Law

Charle’s Law

Pressure’s Law

Ideal Gas Equation

Dalton’s Law of Partial Pressure

Gay-Lussac’s Law of Combining Volume

Graham’s Law of Diffusion

Avogadro’s Law