Can you define an "open ta" is it any ta that is not ta marboota?

Question
Assalaamalaikum

I have a question regarding the "Stopping on the ends of words part 4" lesson.

Can you define an "open ta" is it any ta that is not ta marboota?

JazakAllhu Khairan

Answer
Wa alaikum assalaam wa rahmatullahi wa barakatuh,
An "open" ta', or , is the ta' written as .
The closed "ta" or , is the ta' written as:
Wa iyyaakum.
Wa assalaam