Key Concepts in Chemistry

About Key Concepts in Chemistry

Key Concepts in Chemistry is a key topic in the Edexcel GCSE Chemistryspecification. This topic covers atomic structure, periodic table, ionic and covalent bonding, equations and calculations.

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Atoms, elements, compounds and mixtures Structure of an atom Protons, neutrons and electrons Atomic number and mass number Electron configuration Electron shells and energy levels Isotopes Relative atomic mass Calculating relative atomic mass The modern periodic table Mendeleev and the periodic table Periods and groups Metals and non-metals Electronic structure and position in periodic table Formation of ions Positive and negative ions Ionic bonding Dot and cross diagrams for ionic compounds Properties of ionic compounds Giant ionic lattices Melting and boiling points of ionic compounds Electrical conductivity of ionic compounds Covalent bonds Sharing electrons Single and double covalent bonds Dot and cross diagrams for covalent molecules Properties of simple molecular compounds Weak intermolecular forces Giant covalent structures Diamond Graphite Silicon dioxide Fullerenes and graphene Metallic bonding Properties of metals Alloys Polymers Relative formula mass (Mr)Conservation of mass Balancing chemical equations Calculating masses in reactions The mole Avogadro constant Moles and mass calculations Concentration of solutions Calculating concentration in g/dm³ Calculating concentration in mol/dm³ (HT)Percentage yield Atom economy

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