Talk:Ion
From Academic Kids
From the article:
- The energy needed to remove electrons from an atom is called the ionization energy, and the equivalent electrical potential needed to impart that energy to an electron is known as the ionization potential.
Can someone please fact-check this?
Note: We need the exact Greek language etymology for anion and cation here.
I think anion is from the Greek 'ana' meaning "up" and cation from 'cata' ('kata') meaning "down". However someone should check this before putting it in the article.
From the article:
- Negatively charged ions are known as anions (which are attracted to anodes) and positively charged ions are called cations (which are attracted to cathodes).
But the article for electrode says that anode/cathode may be positive or negative. Is this true for only one case eg electrolysis, or does this sentence need qualification?
We could need a page with Ion-colors, as many Ions are colorful (such as Permanganate, Copper, Vanadium(IV), etc. Anybody got a suggestion how to call it? Maybe Ioncolors? Or we could expand it to other common chemicals: Colors of chemicals? --malbi
Ionization energy and ionization potential are mutually interchangable terms. One can express the ionization energy in terms of an electric potential, but the term is often used with energy units as well. It's just a simple matter of choice.
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"An-", "cat-"
The Greek-derived element "ano-" means up or upwards; "cat-" means "down". See most dictionaries at words such as "cataract", "catatonic", "anabolic" and, well, "anion". "An-" does have several meanings - "not", "back", "throughout", "again" - but "up" seems to be what is meant in anion.
True meaning of n-th ionization potential
What is the source of the statement, that the energy needed for removing two electrons is equal to second ionization energy and not the SUM of first + second ionization energy? According to NIST databse (http://physics.nist.gov/cgi-bin/AtData/levels_form), Ar 1+ is 15.7596 above ground state, Ar 2+ is 27.6297 eV above 1+, etc... According to my calculation, 1520.6 kJ/mol (= first ionization energy) equals to 15.7599 eV and 2665.8 kJ/mol (= second ionization energy) equals to 27.6291 eV. I know from an experimentalist's point of view, that at least about 800eV is needed for argon 8+, and definitely not 143eV (or 13842kJ/mol). So I suggest that the explanation should be changed appropriately. Therefore, the eighth ionization potential is energy needed to remove eighth electron, after the first seven have already been removed. --bucko
Help
I'm a high school student looking for help with my chemistry course. This article is terrible and needs improvement.
Move
This page was unnecessarily disambiguated to Ion (physics), where the page Ion served as a redirect to it. I have therefore moved the physics article here - and it retains a link to the disambiguation page. --Oldak Quill 16:41, 22 Jan 2005 (UTC)
