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Sizing for images If you post to Imgur (the default host for StackExchange) you can use URL suffix codes to change the size of the image in your answer or question: $$ \small \begin{array}{clcc} \hline \text{Thumbnail Suffix} & \text{Thumbnail Name} & \text{Thumbnail Size} & \text{Keeps Image Proportions} \\ \hline \text{s} & \text{Small ...


29

Units formatting Units should always be upright, and be separated by value with a space. This can be achieved best in MathJax with the sequence ~\mathrm{ place unit here }. The tilde generates the space, \mathrm{...} makes sure the text is upright. If your units are a product and/or with superscripts, separate them with a small space \,. Nice additional ...


26

There are quite alot of chemical structure and mechanism drawing tools out there, but I would prefer using the online sketcher provided by ChemDoodle, due to the fact that it's completely online-based, and is quite handy and easy to use. Did I mention that it's completely free? Open the editor tool by going to https://web.chemdoodle.com/demos/sketcher/. Here'...


25

Overview and Quicklinks (ordered chronological, oldest entry first) Units formatting Use mhchem to format chemical expressions Sizing for images Grammar, spelling, and style Clean, descriptive titles improve searching. Remove MathJax / $\rm \LaTeX$ markup in question titles. Be judicious when editing questions that are [on hold] or [closed]. Don't let the ...


23

Clean, descriptive titles improve searching. Martin mentioned it in a comment, but I will summarize here. Good titles help make questions about chemistry experiments, exercises, and problems more searchable. Titles help people find questions, and not just using the internal search. Good question titles will show up in Google (and other search engine) ...


23

Be judicious when editing questions that are [on hold] or [closed]. Editing posts bumps them back to the top of the main page. Only edit closed questions that you think you can improve them to the point that they can be reopened. There is little benefit to the site when low-quality questions with minor edits are bumped to the top pushing more recent ...


19

Use mhchem to format chemical expressions (For people out there who don’t know this … yet.) We have the wonderful mhchem package which comes with the even more wonderful \ce{...} command. What this command basically does, is take plaintext input like you would put it in a chat message, and transforms it into beautiful chemical expressions. (It only works ...


19

Don't let the broad tag be Tags help define categories for questions and thus they make searching easier. Occasionally I see posts — from relatively new users especially — that contain only one broad tag like organic-chemistry, inorganic-chemistry(this one's really broad and unhelpful as the only tag on a question), everyday-chemistry, etc. ...


18

I'll try to answer you with each of the "points" you make. Something is really wrong with Chemistry.SE. Is it? Why do you think a community is wrong and you are right? Maybe you should start listening to some people. I don't know why but people here on MSE are more interested in formatting questions and asking people for more and more context to ...


18

How to find out if a tag is good to have/make I present to you, the MAR Tag Test™ (abbreviated as MATT), a short test with three possible responses to each question, designed as a crude way of diagnosing the health of a (imaginary) tag. Imagine X, a tag$\,\ldots$ 1: Ignore spam. Some people used to tag stuff as beginner or subjective to prevent their ...


18

Instead of \mathrm many people misused \ce, because it was shorter to type. Seeing this, the author of \ce added a little goodie into the mhchem extension. You can type $\pu{1.2E3 J//mol}$ $\pu{1.2E3 J//mol}$ From the documentation: Multiplication \pu{123 J s} $\pu{123 J s}$ \pu{123 J*s} $\pu{123 J*s}$ Division $\pu{123 kJ/mol}$ $\pu{123 kJ/mol}$ $...


16

Use display style maths wherever possible Inline maths mode should be only used for short introductions of terms, a sum formula of a compound. For more complex terms, like fractions or sums, it messes with the spacing of the body and it might become unreadable. Examples Using inline maths environment to produce a rather complicated term with a fraction ...


14

2+2=4\tag{1} $2+2=4\tag{1}$


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Text and spaces in MathJax Trying to put a short phrase in your MathJax, but your spaces keep disappearing? There are a few ways to explicitly insert spaces. For a short phrase it is best to use the \text{...} command like $$\Delta x\, \Delta p \ge \frac{\hbar}{2} , \text{with } \hbar=\frac{h}{2\pi}$$ which produces $$\Delta x\, \Delta p \ge \frac{\...


13

Comprehensive editing I’d like to add another issue that I see not happening way too often: When editing for any of the other points, do a simple check of the text and the MathJax involved, too. Oftentimes I see someone edit the title but not touch the body even though it could be greatly improved by a simple two-minute check, revising capitalisation, ...


13

There is no difference between the two options. (See New flagging dialog has a duplicate for duplicate on Meta Stack Exchange)


13

Unfortunately, there is no real answer we can give that is not already found in the meta.SE link provided in the comments. Diamond moderators are not privy to the internal workings of the automatic question ban; hence, we cannot tell you exactly how many downvotes how many days ago is sufficient to trigger it, or how many upvotes it would take to remove it. ...


12

No, unfortunately there isn't a way to get around this for users without the editing privilege (2000 rep). People have proposed this as a feature on Meta.StackExchange numerous times, but it's thought that people would use it to "game" edits (not on our site in particular, but on a higher volume site like Stack Overflow, this is a problem). So, there are a ...


12

As described in the MathJax documentation, any of the core MathJax extensions can be loaded this way (though this can be restricted via the MathJax configuration).


12

Command Grouping Enable with: \require{begingroup} Environment: \begingroup ... \endgroup Quite a few things are possible with MathJax when you set your mind to it. For example you can define new commands with \newcommand{...}. In order to preserve default behaviour for the other posts, you might want enclose your post in a group with \require{begingroup}....


12

At this time, your question has three close votes as "too broad". This is probably because you've asked about more than one topic (pi bonding in coordination compounds and synergic bonds), and possibly also because either one of these topics by itself may require an extremely long answer. First, I would ask about pi bonds and synergic bonds in separate ...


12

For Angstroms, check out: What additional formatting features are available to MathJax (possibly via \require{})? $\require{mediawiki-texvc}$ The $\ce{C-O}$ bond length in carbon dioxide is $\pu{1.16 \AA}$. $\require{mediawiki-texvc}$ The $\ce{C-O}$ bond length in carbon dioxide is $\pu{1.16 \AA}$. As for the others, I haven't experimented, but I ...


12

A score of 10 means "total upvotes minus total downvotes ≥ 10", not "earned you ≥ 10 reputation".


12

Just going to rattle off a quick answer. There are a few ways. None of them will actively stop people from voting to close, but this is about as good as it gets. Firstly, you can leave a comment, saying "I wouldn't close this because XYZ". Obviously, it helps if you substantiate this, e.g. the references I left might have convinced somebody that the problem ...


12

Well, every time you copy people's answers for your own benefit, a tiny piece of your own soul dies, so that might be sufficient punishment for these people (or at least part of the punishment). (I'm half serious about that: for example, you can copy somebody else's answers for homework or an exam, and you might do very well, but in truth you're the one who ...


12

As I mentioned in a comment (which I've now deleted): I'm afraid none of us can 'unban' you. It's a system ban, it's not somebody who personally chose to impose a ban on you. Please see: What can I do when getting "We are no longer accepting questions/answers from this account"? But, you asked Please review some of my answers Ok, that I can do. ...


11

This change was introduced with MathJax/mhchem v3. That's because it is the recommended way of writing. It is IUPAC's recommendation. Red Book section IR-4.3 shows examples, but is missing a clear text description. The Green Book states "The staggered arrangement is now recommended" and refers to the Red Book. It is ACS's recommendation. The ACS Style ...


11

2-D Reaction Networks Enable with: \require{AMScd} Environment: \begin{CD} ... \end{CD} Construct two-dimensional grids connected with single-headed arrows. Double-headed and double-lined arrows appear not to be supported, unfortunately. mwchem (\ce{...}) is supported, but you have to apply it to each item in the grid, not the entire grid as a single ...


11

Thanks for asking here before posting. Unfortunately it's probably off-topic since it isn't exactly chemistry-related. In fact, it probably wouldn't go over well on any of the Stack Exchange sites (Stack Overflow, Unix & Linux, Superuser, ...). I can't remember where the relevant posts are, but I think it was decided that installation-type questions ...


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