Group properties Alkali metals (only lithium, sodium and potassium for IGCSE): Physical properties: -Good conductors of heat and electricity. -Are soft, compared to other metals. -They have low densities (for metals). -They have low melting and boiling points compared...
Transition elements A collection of metals with the following properties: -hard, tough and strong -high melting points (except mercury) -malleable (can be hammered into different shapes) and ductile (can be drawn out into wires) -good conductors of heat and...
Noble gases Noble gases are unreactive, (also non metals, colourless gases and monatomic). Uses: Helium- filling balloons and aircrafts because it is lighter than air and will not catch fire. Argon – filling (tungsten) light bulbs to stop the filament reacting with...
Periodic Table The Periodic table is a method of classifying elements. They are arranged in order of increasing atomic number. The columns are called groups. The rows are called periods. Metals are to the left and non-metals are to the right. Elements in the same...
Periodic trends Non-metals are on the right side of the periodic table, and metals are on the left. If you go down a period of metals (but not the transition metals) they become more reactive (this is because there are more electron shells so since metals lose...