Hello, and welcome to Chemical Bonding - EASYMODE. Hopefully this site will help you understand chemical bonding in its entirety. And be sure to click on "Images" at the top left corner of the page.
Here we can see the removal of an electron from the Na atom and the transfer of that electron to the Cl atom. (Click on the image to see a larger version)
Covalent Bonding Animation
This image shows the convergence of two hydrogen atoms to make a hydrogen molecule. The electrons in each atom come together, and are shared. (click on the image to bring up a larger version of it)