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### Memorizing charges

Posted: Sun Feb 16, 2020 6:50 pm
Will we have to memorize all of the charges of all of the elements, or just the ones that are in the most common groups (such as Groups 1, 2, 16, 17, etc.)? Is the only way to tell the charge of transition metals by seeing the whole compound the element is in?

### Re: Memorizing charges

Posted: Sun Feb 16, 2020 6:58 pm
For transitional metals, the oxidation states usually vary, so for those I would just go off the compound given. However, it would be a good idea to remember some patterns like columns 1 (+1),2 (+2),16 (-2), and 17 (-1).

### Re: Memorizing charges

Posted: Sun Feb 16, 2020 7:04 pm
We should just know the patterns of group 1 being 1+ group 2 +2 and 17 being -1 and 16 -2.

### Re: Memorizing charges

Posted: Sun Feb 16, 2020 7:05 pm
I'm pretty sure that we only need to know the really common ones that we also use as examples and in homework problems. Only the ones that are constantly repeated will have to be memorized most likely.

### Re: Memorizing charges

Posted: Sun Feb 16, 2020 7:49 pm
I think we would be expected to memorize the charges that appear most on the homework and any Lavelle includes during his lectures.

### Re: Memorizing charges

Posted: Sun Feb 16, 2020 8:00 pm
When it comes to memorizing charges I think it would be safe to memorize the most common elements that he commonly uses for in class example or homework questions.

### Re: Memorizing charges

Posted: Sun Feb 16, 2020 8:58 pm
just know the examples used in class and you should be fine

### Re: Memorizing charges

Posted: Sun Feb 16, 2020 11:02 pm
I believe we are expected to memorize the most common ones and it also good practice!

### Re: Memorizing charges

Posted: Sun Feb 16, 2020 11:11 pm
Just know the common ones

### Re: Memorizing charges

Posted: Sun Feb 16, 2020 11:12 pm
Memorizing the common ones should be fine

### Re: Memorizing charges

Posted: Sun Feb 16, 2020 11:41 pm
I think we should know the ones in groups 1,2,16,17 and any common ones we talk about.

### Re: Memorizing charges

Posted: Thu Feb 20, 2020 2:00 am
The common ones I would definitely have locked down are O which is 2-, H which is 1+, F which is 1-. Elements by themselves (ex. diatomic molecules like Cl2) are 0.