instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Ionic compounds contain cations and anions rather than discrete neutral molecules.
answer:
Ionic compounds contain cations and anions rather than what?

question:
How much is involved in the reaction does the coefficient in front of an element in a formula indicate.
answer:
What does the coefficient in front of an element in a formula indicate?

question:
Water contains 3 atoms.
answer:
How many atoms does water contain?