Count the total number of atoms in h 2 o: 2 3 4 5 6

The total number of atoms is 3.

Make sure to not confuse elements with atoms. Elements are substances used in a chemical equation that cannot be broken down. There are two elements in H2O: hydrogen and oxygen.

Atoms in the compound is the number of elements. Hydrogen would be one atom, but since it has a subscript of 2, it would mean that there are two hydrogen atoms.  Oxygen is another atom, however, it does not have a subscript. Don't make that fool you because there is actually a subscript which is the understood one. That is why there are three atoms.

Hope this helps!!!

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.