Answer:
CH4+2O2-->2H2O+CO2 chemical reaction
Nitrogen and oxygen are the most prevalent in the atmosphere.
The correct answer is option 1. The mass of a proton is approximately equal to 1 atomic mass unit. They almost have the same mass with a<span> neutron </span>while the electron is about 2000 times lighter than the two. The three mentioned particles are the subatomic particles found in an atom.