I need help I'm writing pp1 chem tomorrow anything to revise as a O level candidate

For O-level Chemistry Paper 1, focus on these core areas:

• Atomic Structure and Bonding: Understand protons, neutrons, electrons, isotopes, and how ionic and covalent bonds form. Know the properties of different types of structures (giant metallic, giant covalent, simple molecular, giant ionic).
• The Mole Concept and Stoichiometry: Be able to calculate relative atomic/molecular masses, moles, empirical and molecular formulae, and reacting masses/volumes from balanced equations.
• Acids, Bases, and Salts: Know definitions, reactions (neutralisation), pH, and methods for preparing soluble and insoluble salts.
• The Periodic Table: Understand trends across periods and down groups (e.g., reactivity of Group I and Group VII elements). Know properties of transition metals and noble gases.
• States of Matter and Kinetic Particle Theory: Understand the properties of solids, liquids, and gases, and how they relate to particle arrangement and movement.
• Experimental Techniques: Revise methods for separating mixtures (filtration, distillation, chromatography) and testing for purity.
• Redox Reactions: Identify oxidation and reduction in terms of electron transfer or changes in oxidation states.
• Rates of Reaction: Understand factors affecting reaction rates (temperature, concentration, surface area, catalysts).
• Energetics: Differentiate between exothermic and endothermic reactions.
• Organic Chemistry (Basics): Know the general formulae, functional groups, and simple reactions of alkanes, alkenes, alcohols, and carboxylic acids.

Focus on definitions, basic calculations, and identifying correct statements or diagrams. Good luck with your exam!