The Placement of Positive/Negative Signs in Ionic Notation

AI Thread Summary
The discussion centers on the notation of ions, specifically the placement of positive or negative signs in relation to element names. It clarifies that the charge is typically indicated after the ion name, while the sign before the name may relate to optical rotation. References to IUPAC guidelines highlight that the placement of charge notation is consistent, with no indication of it being interchangeable. Some textbooks may present variations in notation order, but there is no evidence of a "wrong" placement for charge indicators. The conversation suggests that any discrepancies in notation could stem from outdated practices.
ldv1452
Messages
69
Reaction score
0
I've seen ions notated with the postive or negative sign both before and after the element name (usually after). Is this just preference or does its placement indicate anything?
 
Chemistry news on Phys.org
Interesting. My textbook seems to use them interchangeably for some reason.
 
ldv1452 said:
Interesting. My textbook seems to use them interchangeably for some reason.

Some books will flip the order in which A and Z are displaced (that was the case of my first chemistry textbook).

But I have never found a textbook indicating charges in the "wrong" side. Perhaps it's just an old notation that has since disappeared.
 
I want to test a humidity sensor with one or more saturated salt solutions. The table salt that I have on hand contains one of two anticaking agents, calcium silicate or sodium aluminosilicate. Will the presence of either of these additives (or iodine for that matter) significantly affect the equilibrium humidity? I searched and all the how-to-do-it guides did not address this question. One research paper I found reported that at 1.5% w/w calcium silicate increased the deliquescent point by...
Back
Top