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Topic: Two questions  (Read 4070 times)

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Rusky Lionheart

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Two questions
« on: September 01, 2005, 02:33:32 AM »
Hello,

1)How can I distinguish between covalent bond and
   electrovalent bond? If I have just the molecular formula?
   Are there any rules?
                                       ???

2)What is pneumatic bathtub and how does it work?

Thanks,
Rusky Lionheart
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Offline Yggdrasil

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Re:Two questions
« Reply #1 on: September 01, 2005, 03:16:46 AM »
Quote from: Rusky Lionheart on September 01, 2005, 02:33:32 AM
Hello,

1)How can I distinguish between covalent bond and
   electrovalent bond? If I have just the molecular formula?
   Are there any rules?

Ionic (electrovalent) bonds are generally between a metal and a non-metal and covalent bonds are generally between two nonmetals (there are exceptions, such as in NH4HCO3, which is ionic; however, if you are able to recognize most of the common polyatomic ions, you will be able to recognize these exceptions).
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Rusky Lionheart

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Reply
« Reply #2 on: September 01, 2005, 05:23:29 AM »
       :)

Thanks a lot!
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