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Mathematics 9 Online
OpenStudy (anonymous):

Can someone help me figure out which 2 of these are isotopes?

OpenStudy (anonymous):

1. Aluminum 2. Silicon 3. sulfer 4. Silicon 5. Calcium 6. Titanium

OpenStudy (anonymous):

I think

OpenStudy (anonymous):

I would help, but I'm a little rusty on isotopes. You might get more help here on chemistry questions: http://openstudy.com/study#/groups/Chemistry

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