http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. (PhysOrg.com) -- Recently, a trio from Pacific Northwest National Laboratory and Louisiana Tech University showed that strontium ions congregate on water's surface. Their computer simulation and careful calculations finally demonstrated why experiments and conventional wisdom clashed about the behavior of this type of ion, a divalent cation or one with two electrons missing. http://www.physorg.com/news175891519.html Chemistry Tue, 27 Oct 2009 19:46:35 EST news175891519 Calculators are useful tools in elementary mathematics classes, if students already have some basic skills, new research has found. The findings shed light on the debate about whether and when calculators should be used in the classroom. http://www.physorg.com/news138373871.html Other Sciences Tue, 19 Aug 2008 14:11:11 EST news138373871