are a shorthand way of writing elements. Ex. C, H, O, CI, AL, Ca.
When 2 or more elements combine during a chemical reaction, a _______ forms.
Ex. NaCL, C6H12O6 Fe2Oa3, H20.
are a shorthand way of writing compounds. Ex. NH3 (Ammonia) AgNO3 (Silver Nitrate)
is a number placed in front of a chemical formula. It tells the number of molecules making up the chemical formula. Multiply all the elements behind the coefficient by the coefficient. Ex. 2H2O – 2 x H2 2xO = 4 Hydrogen atoms and 2 Oxygen atoms.