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Marisa Gaitan 2D
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Joined: Wed Sep 30, 2020 9:47 pm
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Postby Marisa Gaitan 2D » Tue Nov 17, 2020 7:45 pm

Are there any tips on knowing when a molecule will be a radical? I'm pretty comfortable with drawing lewis structures, but I haven't had much practice with radicals yet. Not sure if there is anything that would specifically show you it would have to be a radical/biradical. Thanks!

Rich Luong 1D
Posts: 97
Joined: Wed Sep 30, 2020 9:49 pm

Re: Radicals

Postby Rich Luong 1D » Tue Nov 17, 2020 7:56 pm

So usually I can tell a molecule is a radical when the counted up electron total is an odd number. Logically, before you even need to draw a lewis structure, there's bound to be a single electron with no pair if there's an odd number of electrons. For example, OH is counted up to be 7 electrons and after bonding with H, that leaves 5 electrons to surround around O leaving one electron to be by itself. I hope this helps!

Breanna Ouyang 1I
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Re: Radicals

Postby Breanna Ouyang 1I » Tue Nov 17, 2020 8:07 pm

I agree with Rich! A radical just means there's an unpaired electron left in the compound, so if you count up all the valence electrons of atoms included in a compound and it's an odd number, chances are it's a radical. It would probably be in a question asking about highly reactive substances or related concepts.

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