Scientia QA - Intrebari recente cu tag-ul injumatatire https://www.scientia.ro/qa/tag/injumatatire Powered by Question2Answer Timpul de injumatatire este specific oricarui element chimic? https://www.scientia.ro/qa/13178/timpul-de-injumatatire-este-specific-oricarui-element-chimic De exemplu, apa in stare pura, adica doar H2O,  are timp de injumatatire? Fizica https://www.scientia.ro/qa/13178/timpul-de-injumatatire-este-specific-oricarui-element-chimic Sun, 27 Jan 2013 18:52:06 +0000