Identify the incorrect statement about hydrogen. 

Hydrogen exists as a diatomic gas in its natural state.

Metallic hydrides are formed with the reaction of hydrogen and alkali metals.

Hydrogen is the most abundant gas in the earth's atmosphere.

Hydrogen is primarily used in the industry for manufacturing ammonia through the Haber process

Hydrogen can act as an oxidizing agent resembling halogen ions.

The reaction of methane with steam is the most common method of producing hydrogen gas in the U.S.