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- @AtGraphic 155,14
- @picture *Sumtop.bmp
- @atGraphic ,+126
- @loop 4
- @picture *SumMid.bmp
- @atGraphic ,+60
- @endloop
- @picture *Sumbttm.bmp
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- @At 185,68
- #^#* #^Every element has a symbol. These are shown in the periodic table.
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- @At ,+10
- #t#*#tA compounds is written down using a chemical formula.
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- @At ,+10
- #t#*#tA chemical formula takes account of the bonding in the compound.
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- @At ,+10
- #t#*#tA compound can contain more than one atom of each element.
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- @At ,+10
- #t#*#tEach element in the periodic table has a valency which indicates
- #t#thow it will bond.
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- @At ,+10
- #t#*#tThe valency of main group metals is the same as the group number.
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- @At ,+10
- #t#*#tThe valency of non metals is the group number -8.
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- @At ,+10
- #t#*#tRadicals are covalent ions that bond to form ions. Radicals
- #t#talso have a valency.
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