Which is true of a balanced combustion reaction?

Atoms are conserved.
Mass is conserved.
Both are correct.

confused

Example:

CH4 + 2O2 ==> CO2 + 2H2O
16 + 64 = 44 + 36

What do you think?
Are atoms conserved? That is, do you have the same number of atoms on each side?
Is mass conserved? That is, do you have the same number of grams on each side?