Oxidation Numbers

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Dustin Shin 2I
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Joined: Fri Sep 28, 2018 12:26 am

Oxidation Numbers

Postby Dustin Shin 2I » Wed Feb 27, 2019 11:08 pm

Going into Test 2, are we expected to know all of the natural oxidation numbers for each element or are there few select ones we should already know or have memorized by the test? Or will they be given?

Posts: 92
Joined: Fri Sep 28, 2018 12:24 am

Re: Oxidation Numbers

Postby Meachelle_Lum_1I » Thu Feb 28, 2019 12:20 am

I don’t think it will be given but some helpful tips is that the Halogens all have a -1 charge. Column 1 all has a +1 charge. And the elements in the same row as oxygen all have -2 charge.

Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

Re: Oxidation Numbers

Postby Albert_Luu3K » Thu Feb 28, 2019 1:12 am

What Meachelle said above hits the spot perfectly. We will not be expected to know all of the oxidation states of elements, but know a few general rules for certain columns in the periodic table will help definitely.

Cynthia Aragon 1B
Posts: 47
Joined: Mon Apr 09, 2018 1:38 pm

Re: Oxidation Numbers

Postby Cynthia Aragon 1B » Thu Feb 28, 2019 4:31 am

Other helpful rules to remember include:
1. The oxidation number of an atom is zero in a neutral substance that contains atoms of only one element. Thus, the atoms in O2, O3, P4, S8, and aluminum metal all have an oxidation number of 0.

2. The oxidation number of simple ions is equal to the charge on the ion. The oxidation number of sodium in the Na+ ion is +1, for example, and the oxidation number of chlorine in the Cl- ion is -1.

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