Given a scientific question, generate a correct answer to it.

Input: Consider Input: Radioisotopes may vary greatly in their rate of decay, decaying faster if their nuclei are more what?

Output: unstable

Input: Consider Input: What is the name of the "point" that refers to the temperature at which water vapor condenses?

Output: dew point

Input: Consider Input: What are the three forms of water as found in nature?
Output: solid, liquid, gas