notation - What does the ‘−1’ superscript mean in units? - Chemistry ...
Oct 22, 2014 · The −1 1 superscript can be thought of as saying "per" or as being the denominator of the fraction. So in your example mol⋅L−1sec−1 m o l L 1 s e c 1 can be thought of as saying moles per …
Why Ca 2+ and not Ca +2 - Chemistry Stack Exchange
Nov 28, 2019 · In the context of charges, 2+ means two positive things, 3- means three negative things. (In the case of ions, the charge represents the difference from a net zero, neutral, charge, but that …
What is the "‡" symbol meaning in a reaction mechanism?
May 22, 2020 · What does this symbol mean? I have seen it before as a superscript at the Gibbs energy symbol. References Organic Chemistry; Clayden, J., Ed.; Oxford University Press: Oxford; New …
What does this three-number isotope notation mean?
Closed 7 years ago. What does the superscript $3+$ mean? $$_ {21}^ {45}\mathrm {Sc}^ {3+}$$ I understand that $45$ is the atomic mass number and $21$ is the number of protons. Is the $3+$ to …
What is the meaning of the "dot" notation in chemical formulas?
Feb 27, 2015 · By writing $\ce {AB.xCD}$ chemists mean that there are CDs are found in the crystalline framework of AB. The most common example of this is water trapped inside the crystal structure of …
Why was a Plimsoll symbol chosen to indicate standard state?
Jan 27, 2019 · According to Wikipedia, The plimsoll symbol (⦵ or o) ... is used as a superscript in the notation of thermodynamics to indicate an arbitrarily chosen non-zero reference point ("standard …
Confused by notation of atomic number Z and mass number A on …
Apr 28, 2019 · In the Periodic Table I see $$\ce {^ {6}_ {12}C}$$ However, in books when talking about isotopes I see $$\ce {^ {12}_ {6}C}$$ I don't understand the difference between the two. I know what …
Superscript open circle notation in formula
Indicate a free radical by placing either a centered dot or a superscript dot, signifying the unshared electron, next to the chemical symbol or compound formula This convention is also followed by the …
What does the letter R represent in chemical structures?
Aug 4, 2017 · As Todd Minehart shared, it stands for radical. The letter R is a placeholder used in organic chemistry to represent a generic substituent group or the rest of the molecule. This allows us …
What do these labels for molecular electronic states mean?
Aug 31, 2016 · $$ {}^2\!A_2, {}^2\!B_1, {}^4\!A''$$ I am confused with these representations, found in the abstract of this paper. I think it is kind of a representation of electronic excited states. The left …