This video explains the process of correctly naming simple binary ionic compounds (from a formula) or correctly writing a chemical formula (from a name).
<a rel="nofollow" class="external text" href="https://vimeo.com/user13307899">James McKirdy</a>
CC BY 3.0
<a href="//commons.wikimedia.org/wiki/Category:Vimeo" title="Category:Vimeo">Vimeo</a>: <a rel="nofollow" class="external text" href="https://vimeo.com/72979311">RV 1.2.1 Nomenclature Pt. 1 - Ionic Compounds</a> (<a rel="nofollow" class="external text" href="//web.archive.org/web/*/https://vimeo.com/72979311"><span style="color:#9602fc">view archived source</span></a>)