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Topic: Lanthanides & Actinides  (Read 3798 times)

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Offline Winga

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Lanthanides & Actinides
« on: February 11, 2005, 02:08:06 AM »
Are these two terms used to describe the negative ion of lanthanoids and actinoids?

The ending "ide" is to indicate a negative ion, right?

Therefore, "lanthanides" =/= "lanthanoids" & "actinides" =/= "actinoids"?
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Offline Mitch

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Re:Lanthanides & Actinides
« Reply #1 on: February 11, 2005, 02:34:09 AM »
not in this case
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Offline jdurg

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Re:Lanthanides & Actinides
« Reply #2 on: February 11, 2005, 08:27:14 AM »
The terminology 'lanthanides' and 'actinides' is somewhat archaic and can cause a lot of confusion like this.  "Lanthanides" is the term given to elements 57-70 (Some include 71 as well) and it is also the proper term for a negative La ion.  The same can be said for the Actinides as well.  Really, the terms 'Lanthanoids' and 'Actinoids' are a more 'proper' description, but since when has chemistry terminology been proper?   ;) ;D
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