Here's why:
* Molecule: A molecule is the smallest unit of a compound that retains the chemical properties of that compound. It's formed by two or more atoms bonded together.
* Chemical Formula: A chemical formula uses symbols to represent the elements present in a molecule, and subscripts to indicate the number of atoms of each element.
For example:
* H₂O: This formula tells us that a water molecule is made up of two hydrogen atoms (H) and one oxygen atom (O).
* CO₂: This formula tells us that a carbon dioxide molecule is made up of one carbon atom (C) and two oxygen atoms (O).
Let me know if you'd like more examples!