Formulae & Names of Ionic Compounds Ionic compounds are formed from a metal and a nonmetal bonded together Ionic compounds are electrically neutral; the positive charges equal the negative char...
Ionic Lattices The ions form a lattice structure which is an evenly distributed crystalline structure Ions in a lattice are arranged in a regular repeating pattern so that positive charges cancel o...
Forming Ions As a general rule, metals are on the left of the Periodic Table and non-metals are on the right-hand side Ionic bonds involve the transfer of electrons from a metallic element to a non...
Halogens The halogens These are the group 17 non-metals that are poisonous and include fluorine, chlorine, bromine, iodine and astatine Halogens are diatomic, meaning they form molecules of two ato...
Alkali Metals The group 1 metals The group 1 metals are called the alkali metals because they form alkaline solutions with high pH values when reacted with water Group 1 metals are lithium, sodium,...
Oxides Oxides across a period The acid-base character of the oxides provides evidence of chemical trends in the periodic table The broad trend is that oxides change from basic through amphoteric to...
Metallic & Non-metallic Periodic trends can also be seen in the typical properties of metals and non-metals which are summarised below: The typical properties of metals and non-metals The typic...
Electronegativity: Definition Electronegativity is the ability of an atom to attract a pair of electrons towards itself in a covalent bond This phenomenon arises from the positive nucleus’s ability...
Electron Affinity When atoms gain electrons they become negative ions or anions Electron affinity (EA) can be thought of as the opposite process of ionisation energy and is defined as The amount of...
