Thursday, October 6, 2011

Ionic Compounds

What I need to know about ionic compounds:

  • Formed between metallic and non-metallic elements
  • Electrons are transferred  from the metal to the non-metal.  This only happens between the valence energy shells (outer orbitals) of the atoms.
  • When this occurs, both atoms become ions (charged)
  • The metal, having lost negative electrons, is now positively charged and is called a cation.
  • The non-metal, having gained negative electrons, is now negatively charged and is called an anion.
  • These ions will combine in proportions that allow the metals to give away all their unpaired electrons and the non-metals to acquire a full octet of electrons.
Extra reading:
  • Ions: http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa/atomic/ionicrev1.shtml
  • Ionic Bonds: http://www.teachersdomain.org/resource/lsps07.sci.phys.matter.ionicbonding/
  • Chemical bonds: http://www.teachersdomain.org/resource/lsps07.sci.phys.matter.chembonds/
  • Chemical bonds: http://www.visionlearning.com/library/module_viewer.php?mid=55

4 comments:

  1. I should mention!

    When dissolved in water (aqueous) ionic compounds separate (dissociate) into their ions. So, you will end up with charged particles moving about in water. This is the perfect condition for conducting electricity!

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  2. Thank you Ms. Camille, I've found this information very useful and helpful.

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  3. Miss, I have one question, What happens if a lithium (Alkali Metal) transferres an election to Xenon (Noble Gas)? What would be the formula of the ionic compound?

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  4. Sorry for the late reply Hasan...

    Xenon has a full octet of electrons in its valence shell therefore, it will not accept any more. So noble gases, like xenon, won't react with anything...not even the more reactive of substances! It's also why they are called inert gases where the word 'inert' means unreactive.

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