training on 26 march 2009
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| chlorine has a low bpt | VAN DER WAALS FORCES OR INTERMOLECULAR FORCES ARE WEAK. LITTLE ENERGY NEEDED TO OVERCOME FORCES.
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| IONIC compounds have HIGH mpts | ELECTROSTATIC FORCES OF ATTRACTION BTW OPPOSITELY CHARGED IONS ARE VERY STRONG. HUGE AMOUNT OF ENERGY TO BREAK BONDS.
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| METALS ARE GOOD ELECTRICAL CONDUCTORS. | THE VALENCE ELECTRONS OF THE METAL ATOMS ARE DELOCALISED. THESE DELOCALISED ELECTRONS ARE MOBILE AND MOVE FREELY BETWEEN THE POSITIVE METAL IONS.
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| GRAPHITE IS SOFT | THE VAN DER WAALS FORCES BTW THE LAYERS OF CARBON ATOMS ARE WEAK. THEY CAN SLIDE EASILY OVER ONE ANOTHER.
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| DIAMOND DOES NOT CONDUCT ECITY | EACH CARBON ATOM USES UP ALL ITS 4 VALENCE ELECTRONS FOR BONDING WITH OTHER CARBON ATOMS. SO NO FREE ELECTRON REMAINING TO CONNDUCT CURRENT.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
alexteoh
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