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Precisely ! Fe XXV ? That sounds a bit like descendent from a long line of monarchs.
by houseofshards 12y ago
Precisely ! Fe XXV ? That sounds a bit like descendent from a long line of monarchs.
- guard-of-terra 12y agoNASA site spells it the same. Presumably it's how physicists call ions.
- tinco 12y agoI learned to spell ions like that in highschool, though never more than Fe III, I think.
- gus_massa 12y agoI also thought that FE XXV was a misspelling, or bad use of notation. But it's (apparently) the usual notation in spectroscopy. http://www.nist.gov/data/PDFfiles/jpcrd200.pdf http://www.nist.gov/data/PDFfiles/jpcrd200.pdf FE I is not ionized Fe (26 protons, 26 electrons, 0 net charge) FE II is ionized Fe (26 protons, 25 electrons, +1 net charge) FE III is not ionized Fe (26 protons, 24 electrons, +2 net charge) ... FE XXV has (26 protons, 2 electrons, +24 net charge) FE XXVI has (26 protons, 1 electron, +25 net charge) -- This is not the standard chemical notation. In chemistry: FE II is ionized Fe++ (26 protons, 24 electrons, +2 net charge) FE III is ionized Fe+++ (26 protons, 23 electrons, +3 net charge)