Ionic Formulae LO: Use knowledge of the periodic table to find out what charge an ion has (C) Deduce the formulae of simple ionic compounds (B) Use the.

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Presentation transcript:

Ionic Formulae LO: Use knowledge of the periodic table to find out what charge an ion has (C) Deduce the formulae of simple ionic compounds (B) Use the Rutherford model of the atom to determine the charge of ions and the formulae for ionic compounds. Starter How many atoms are in each of these compounds ? CuO CuSO 4 C 10 H 22 NH 3 (NH 4 ) 2 SO 4

Whiteboards Draw the atom or the ion……. Fluorine atom Fluorine ion Oxygen atom Oxygen ion Magnesium atom Magnesium ion

Sodium Chloride NaCl Remember that ionic compounds have an EQUAL number of positive and negative charges. Add the charges to the sodium and chloride ions.

Working out the charge. Sulphate SO 4 = -2 Nitrate NO 3 = -1 Carbonate CO 3 = -2

Work out the formulae SimpleChallenge Potassium BromideAluminium Sulphate Lithium FluorideMagnesium Nitride Calcium Sulphide Calcium Sulphate Calcium Chloride Aluminium Bromide Barium Iodide Sodium Nitrate

Figure out your own…. Think of an ionic compound (or choose 2 random elements or) Work out what the formula would be. Write down the name and formula for 5 ionic compounds.