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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: Rusky Lionheart on September 01, 2005, 02:33:32 AM

Title: Two questions
Post by: 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?
                                       ???

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

Thanks,
Rusky Lionheart

Title: Re:Two questions
Post by: Yggdrasil 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).

Title: Reply
Post by: Rusky Lionheart on September 01, 2005, 05:23:29 AM

       :)

Thanks a lot!