It would either be A or B but in my perspective, I believe it is A
Answer:
The d means that.
can range from to , or in this case,
The total number of nodes is always equal to , so in this case, there are 3 total nodes.
The number of angular nodes is equal to , so a 4d orbital has 1 radial node and 2 angular nodes.
I would say it is the amount of mass, but double check
