Monovalent potassium sodium chloride silver,
divalent calcium oxide barium magnesium zinc,
Three aluminum, four silicon and five valent phosphorus.
2-3 iron, 2-4 carbon,
246 sulfur and 35 nitrogen,
One or two coppers of mercury have changed prices,
The zero price of a single substance never changes.
Negative hydroxide nitrate,
Negative dicarbonate sulfate,
Negative trivalent phosphate,
The positive one is ammonium.