Chemical Formulas

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Sophia Dinh 1D
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

Chemical Formulas

Postby Sophia Dinh 1D » Fri Oct 04, 2019 6:43 pm

When writing the empirical or molecular formula, does it matter which order the elements are in?

Amina Durrani 3G
Posts: 52
Joined: Sat Jul 20, 2019 12:16 am

Re: Chemical Formulas

Postby Amina Durrani 3G » Fri Oct 04, 2019 7:20 pm

I remember learning in HS that Carbon goes first, then Hydrogen, and then all other elements but in alphabetical order. Hope this helps (:

Chanel D_4E
Posts: 57
Joined: Wed Sep 11, 2019 12:17 am

Re: Chemical Formulas

Postby Chanel D_4E » Fri Oct 04, 2019 7:24 pm

I believe so. You would write H20 not OH2 because the element with the positive oxidation number comes first or before the element with the negative oxidation number.

Hailey Kim 4G
Posts: 110
Joined: Sat Jul 20, 2019 12:16 am

Re: Chemical Formulas

Postby Hailey Kim 4G » Fri Oct 04, 2019 7:45 pm

There is a certain order the elements should be in. One of the first things my HS chemistry teacher taught us was the "Hill System," which states that carbon atoms should go first, followed by hydrogen atoms, and then all other atoms would be in alphabetical order.


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