Welcome to ATP. Yep, looks like a ZZ.
When you have time you can go to your page (the icon of a person) and click on "Change your site preferences".
You can set the way you want to see some things, click 'yes' to be notified when you receive an ATP email (we call them Tree-mail), click 'yes' for the weekly newsletter, click 'yes' to automatically watch threads that you start, you can select how many posts (from 20 up to 400)will appear on the page, and many other choices. Don't forget to click on "Save your changes".
Not specific to your plant but I keep this link handy when I need to remind myself how to propagate plants.
http://extension.missouri.edu/...
Don't try to root the leaf in water. If you take an entire leaf, let it callous over/dry, stick it in some damp potting medium and wait, it will make a new plant. If you use Google Images with the keywords "propagate zz plant leaf" you will find several images of successful propagation by this method. Keep in mind that most of the activity of this plant occurs underground for the first year or two...it will be a long time so be patient.
