Diagrams and Formulas (Leaving Cert Chemistry): Flashcards

Electron transfer in ionic bonding

Electrons from different atoms

Positive ions (cations)

Negative ions (anions)

3D arrangement of ions in regular pattern

Smallest repeating unit of crystal

Total positive = total negative charges

Metal first, then non-metal

Groups of atoms with overall charge, act as single units

Negative (except $NH_4^+$ ammonium)

More than one polyatomic ion needed

Metal can form ions with different charges

Roman numerals in compound name