Define first ionisation energy

Define electron shielding

Define successive ionisation energies

Define second ionisation energy

Define shell

Define principal quantum number

Define atomic orbital

Define sub-shell

Define electron configuration

Define compound

Define ionic bond

Define giant ionic lattice

Define group

Define covalent bond

Define lone pair

Define dative covalent bond

Define electronegativity

Define permanent dipole

Define polar covalent bond

Define polar molecule

Define intermolecular force

Define permanent dipole-dipole force

Define van der Waals' forces

Define hydrogen bond

Define metallic bonding

Define delocalised electrons

Define giant metallic lattice

Define simple molecular lattice

Define giant covalent lattice