explain how the position of an element in the Periodic Table is related to the arrangement of electrons in its atoms and hence to its atomic number
explain how the position of an element in the Periodic Table is related to the arrangement of electrons in its atoms and hence to its atomic number
describe how Mendeleev organised the elements based on their properties and relative atomic masses
describe how discovery of new elements and the ordering elements by atomic number supports Mendeleev’s decisions to leave gaps and reorder some elements
describe metals and non-metals and explain the differences between them on the basis of their characteristic physical and chemical properties, including melting point, boiling point, state and appearance, density, formulae of compounds, relative reactivity and electrical conductivity
recall the simple properties of Group 1 elements including their reaction with moist air, water, and chlorine
recall the simple properties of Group 7 elements including their states and colours at room temperature and pressure, their colours as gases, their reactions with Group 1 elements and their displacement reactions with other metal halides
predict possible reactions and probable reactivity of elements from their positions in the Periodic Table
describe experiments to identify the reactivity pattern of Group 7 elements including displacement reactions PAG1
describe experiments to identify the reactivity pattern of Group 1 elements