User talk:Chem507f093

File copyright problem with File:Diffusion semiinfinite.png
Thank you for uploading File:Diffusion semiinfinite.png. However, it currently is missing information on its copyright status. Wikipedia takes copyright very seriously. It may be deleted soon, unless we can determine the license and the source of the file. If you know this information, then you can add a copyright tag to the image description page.

If you have uploaded other files, consider checking that you have specified their license and tagged them, too. You can find a list of files you have uploaded by following this link.

If you have any questions, please feel free to ask them at the media copyright questions page. Thanks again for your cooperation. Skier Dude ( talk ) 04:53, 5 December 2009 (UTC)

Semiconductors
Please be aware that many of the topics that you are drafting in Sandbox are already well covered in Wikipedia. For this reason, before you upload your content (which looks extensive), please take the time to check that related articles do not already exist, and do not overwrite current articles before checking with other editors. Your contributions are welcome, of course. You (and especially your instructor) are strongly encouraged to communicate your plans with the community here at Wikipedia_talk:WikiProject_Chemistry, otherwise you risk simply being a nuisance, vs the help that you surely can be.--Smokefoot (talk) 22:38, 17 December 2009 (UTC)