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We made a chemistry calculator for Android and iOS !

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mapioi:
Android: https://play.google.com/store/apps/details?id=io.github.mapioi.unhexennium

iOS: https://itunes.apple.com/us/app/unhexennium/id1383947062


There are many features, including a range of informations on elements, a formula builder that supports molecules and ionic compounds, and last but not least an instantaneous equation balancer which supports charges and redox equations, along with mass - mole conversions.

Please tell us what you think could be improved or added, and we hope it’ll help some of you  !

Here's our github if you're interested: https://github.com/Mapioi/unhexennium/tree/master

Mitch:
I like the app. The app is missing elements, and I'm not sure what formula is suppose to be.

mapioi:
> I'm not sure what formula is suppose to be.

Formula is a tab that allows you to build molecules or ionic compounds, and then get information or do some math. You can modify the default molecule using the "+" icon on the left, to add elements, or the edit button on the right to for example change charge or subscripts. You can start from scratch by using the bin button on the right, and choose molecules / compounds by name by using the edit button after having selected the outermost rectangle (the one that is highlighted in green). Please tell me if there are some parts that aren't clear, I'd be happy to explain.

> The app is missing elements

Hm, I'm not sure I see which ones are missing.. We followed the IB booklet (http://www.ibchem.com/root_pdf/data_booklet_2016.pdf, see page 10), and I'm not aware of any elements we could add.

Thanks for the feedback !

Mitch:
You're missing elements 113 through 118. https://www.webelements.com
https://en.m.wikipedia.org/wiki/Periodic_table_(large_cells)

mapioi:
Oh yes, that's because as one of the developers is following the IB programme, we've used the IB periodic table instead of IUPAC's.




However we're planning on changing these for the next update.

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