One molecule of caffeine contains 88 atoms of carbon, 1010 atoms of hydrogen, 44 atoms of nitrogen, and 22 atoms of oxygen. Write the formula for caffeine with the elements in the order that they are given.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

you didnt put any of the following

i believe the answer is three water molecules