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Group activity Starter
In your groups, draw the electronic structure of the
following atoms:
GROUP 1 GROUP 2 GROUP 6 GROUP 7
Lithium Beryllium Oxygen Fluorine
Sodium Magnesium Sulfur Chlorine
Potassium Calcium
5 mins
*…read more

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Class discussion L.O 1
Levers
The overall charge on any ionic compound is zero. The
compounds are neutral.
The charges on the ions in a compound cancel out:
Ionic compound Ratio of ions in Formula of
compound compound
sodium chloride Na+ : Cl- NaCl
1:1
magnesium oxide Mg2+ : O2- MgO
1:1
calcium chloride Ca2+ : Cl- CaCl2
1:2…read more

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Class discussion L.O 1
Levers
Groups of metals
· The atoms of Group 1 elements form 1+ ions, eg. Li+
· The atoms of Group 2 elements form 2+ ions, eg. Ca2+
Groups of non-metals
· The atoms of Group 7 elements form 1- ions, eg. F-
· The atoms of Group 6 elements form 2- ions, eg. S2-…read more

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Individually Task
1) What is the overall charge on an ionic compound?
2) What is the formula of magnesium chloride?
3) What is the formula of lithium sulfide?
Extension: What is the formula of iron(iii) oxide?
1) 0
2) MgCl2
3) Li2S
Extension: Fe2O3
5 mins…read more

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Class discussion L.O 2
The names of compounds of transition metals contain the
charge on their ions in brackets in roman numerals.
This is because they can form ions carrying different sizes of
positive charge. eg. Iron can form 2+ and 3+ ions.
So the name iron(iii) oxide tells us that the iron is present as
Fe3+ ions in this compound.
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