Question

its time for the unit exam. this is your opportunity to show how much you have gai
if you dont feel ready, you may want to stop and clarify anything you do not understa
over any notes you have taken and review the key terms.
good luck!
note: to answer some of the questions, it may help to reference a periodic table.

what is an expression that shows the number of each type of atom present in a
compound?
o chemical change
o chemical reaction
o chemical formula
o chemical equation

Explanation:

A chemical formula uses symbols to represent the elements in a compound and subscripts to show the number of each type of atom. A chemical change is a process where substances transform into new substances. A chemical reaction is a process that involves the breaking and forming of chemical bonds. A chemical equation is a symbolic representation of a chemical reaction.

Answer:

chemical formula