The Tlak Social plugin for Joomla provides an easy to set Facebook Social configuration which will allow you to enter a simple syntax in any desired article and show a Facebook social plugin of you election.
The most simple syntax to insert a Facebook social plugin is like this:
Don't want to type the syntax, then make sure you download the package that contains an editor button to assist you in entering the plugin configuration
If you don't mind typing the syntax yourself then just install the content plugin and use a syntax such as
[tlaksocial class="fb-comments" data-colorscheme="dark" data-href="" data-num-posts="10" data-order-by="social" data-width="450px"/]