Carbon and hydrogen
Oxygen and silica
Petroleum. For details about the chemistry you might wish to consult the benzene page on wikipedia.
main group elements
The two main elements that make up most of Earth's core are iron and nickel. These heavy metals are believed to be the primary components that give the core its dense and solid nature.
The two elements in the main coordinate used for absolute location are latitude and longitude. Latitude specifies the position north or south of the equator, while longitude specifies the position east or west of the prime meridian.
Carbon and hydrogen are the two main elements that make up crude oil.
The two main elements found in stars are hydrogen and helium. These elements are the most abundant in stars and are essential for nuclear fusion reactions that power a star's energy generation.
Hydrogen and helium
Oxygen and silica
mainly water ,they are two basic elements of combustion.
The main elements are carbon, hydrogen, nitrogen, sodium and oxygen.
The main elements of lpg are, butane , methane(CH4) and etyl mercaptan.
Austin Draves
hydrogen and methane
The two main parts are the Head and Body.
Carbon and Nitrogen
Oil and Ice