instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
When the phosphorus element - whose name means "light bringing" - was first isolated, scientists noted that it glowed in the dark and burned when exposed to air
answer:
When what element - whose name means "light bringing" - was first isolated, scientists noted that it glowed in the dark and burned when exposed to air?


question:
Sodium-potassium pumps help nerve cells establish a voltage across their plasma membranes.
answer:
Sodium-potassium pumps help nerve cells establish a voltage across their what?


question:
The name of the group that rats are a part of is rodents.
answer:

What is the name of the group that rats are apart of called?