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- '@Disable Forward
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- @At 135,15
- Other radicals involve more than two atoms bonded together.
- The carbonate radical has three oxygen atoms bonded to a
- central carbon atom.
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- @PlaySoundFile ADB60_02.wav
- @AtGraphic 130,100
- @Picture ADB60_01.bmp
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- @WaitForSoundToFinish
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- @Prompt
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- @At 135,75
- The two single bonded oxygen atoms each have a one electron
- gap which means that the radical can accept two electrons
- to become CO32-.
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- @Prompt
- @At 132,140
- The other oxygen containing radicals sulphate SO42- and nitrate
- NO3- both have similar structures.
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- @Prompt
- @At 129,196
- To make life easy for you the radicals that you need are included
- in the Formula editor. Just treat them like single elements.
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- @Wait 1
- Try using the Formula Editor to write the formula for Calcium
- Carbonate.
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- '@Answer CaCO3
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- '@Feedback Wrong
- '#bNo#b, to write calcium carbonate you should drag a calcium atom
- 'into the metal box and then a carbonate radical into the non
- 'metal box.
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- '@Animation BoseGrim
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- '@Feedback Correct
- '#bYes#b, it couldnÆt be easier.
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- '@Animation BoseSmile
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- @Prompt
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- @At 127,304
- Now use the formula editor to write the formula for Calcium Nitrate.
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- '@Answer Ca(NO3)2
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- '@Feedback Wrong
- '#bNo#b, calcium has a valency of 2 so you need two nitrate ions.
- 'A bracket is used to avoid confusion.
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- '@Animation BoseGrim
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- '@Feedback Correct
- '#bYes#b, you will notice that the formula editor puts the extra brackets
- 'in to avoid confusion.
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- '@Animation BoseSmile
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- @Enable Forward
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