[ed seeley]

It'll do fine and grow quickly as it's much nearer the light. You'll find you get a lot of side-shoots growing.

 

[ed seeley]

The broken leaves will die. They grow from the mersitems which are on the stem. As long as you are dosing the tank properly and have sufficient CO2, they don't need to be rooted in the substrate at all. The only time they might need to be rooted is if you had a nutritious substrate and didn't dose the water column.