GCSE Chemistry Revision Notes - everything!
Page of 9/29/2012 Chemistry Syllabus Atoms Atomic structure Relative molecular and formula masses Chemical formulae and chemical equations Ionic compounds Covalent substances Electrolysis Metallic crystals The Periodic Table Group 1 elements Group 2 elements Group 7 elements Oxygen and oxides Sulphur and nitrogen Hydrogen The transition metals – iron and copper Reactivity series Preparing and analysing Alkanes Alkenes Ethanol States of matter Acidic, alkalinity and neutralisation Energetics Rates of reaction Dynamic Equilibria Extraction and uses of metals Natural oil and gas Synthetic polymers The manufacture of chemicals ________________ ________________ Atoms The simplest substances from which all other substances are made up are called elements. They are shown in the periodic table and can be represented by a chemical symbol. This consists of one or two letters. The first letter is always a capital letter. Elements can be divided into groups into two ways: . Solid, liquid and gas 2. Metal and non-metal Elements combine in fixed proportions to form compounds. The compound sodium chloride is composed of two elements: the metal, sodium, and the non-metal, chlorine. The compound calcium carbonate contains the metal, calcium, and two non-metals carbon and oxygen. All elements are made up of atoms. An atom is the smallest part
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