[Georgiaxox]

I am really good at sciece, really bad behavior, but really smart, ecspecially when it comes to atoms and the periodic table, but how do you work out the formula?

[Wondergirl]

Which formula?

[Georgiaxox]

h20, k, and o

[ebaines]

Each element on the periodic table has a 1 or 2 character abbreviation, so for example H = hydrogen, O = oxygen, K = potassium, and He = helium. In describing the chemical make-up of a molecule chemists list the various constituent elements and also the number of atoms of each in a molecule. One exception - if there is only one atom of a certain element then the element is shown without a number. Thus an H2O molecule has two hydrogen atoms and 1 oxygen atom in it. C2H6 has two carbon atoms and 6 hydrogen atoms. NaCl has one sodium atom ("Na") and one chlorine atom. Molecules of pure elements may have more than one atom per molecule - for example molecular oxygen has two oxygen atoms per molecule (O2), whereas helium has just one (He).

Hope this helps - does it get at what you were looking for?