Final answer:
The ignition temperature of natural gas, represented mostly by methane, ranges from 500 to 700¹F.
Step-by-step explanation:
The ignition temperature of natural gas is the lowest temperature at which it will spontaneously combust in air without an external source of ignition, such as a spark or flame. The correct answer to the question regarding the ignition temperature (¹F) for Natural Gas is B) 500-700¹F. This range is a smidge higher than the boiling point of water and is in the typical range for hydrocarbon gases like methane, which is the primary component of natural gas. A known property of methane is its comparably low ignition temperature, making it important to handle and store the gas safely to prevent accidental ignition.