H2O is A chemical reaction of the most oxygen atoms
A. Reactants, products
In a chemical reaction, reactants interact to form products
Ammonia, ammonium hydroxide, calcium hydroxide and oxide. I think...
VSEPR notation gives a general formula for classifying chemical species based on the number of electron pairs around a central atom. However, not all species have the same molecules.
For example, carbon dioxide and surfer dioxide are both species, but one is linear and another one is bent.