ba arze salam, inja chanta site dar morede chemie moarefi mikonam
omidvaram be dardeton bokhore
http://daneshnameh.roshd.ir/mavara/mav ... k&Rand=0
http://www.chempic.com/home.php
http://chemistry-dept.talif.sch.ir/index.php
http://www.shimi.ir/
Ba doroud