Atoms and ions of different elements always have different numbers

a. electrons

b. neutrons

c. protons

d. masses

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

the answer would be a

that's what i got you can count the number of atoms