1. The Language of Chemistry

2. Language of Chemistry Formula:
A combination of symbols that shows the ratio of elements in a compound.
ex: H2O

3. Chemical Equation:
A short, easy way to show a chemical reaction, using symbols instead of words
ex: 2Na + Cl2  2NaCl

4. Subscript: A small number in a formula that tells the number of each element in a compound.
ex: CO2

5. Coefficient: ex: 2Na + Cl2  2NaCl
A BIG number placed in front of a formula in an equation that tells how many atoms of each reactant and product are involved in a reaction.
ex: 2Na + Cl2  2NaCl

6. Reactant: A substance that enters into a chemical reaction (what you start with).

7. Product: A substance formed as a result of a chemical reaction (what you produce or end with).

8. +: Is added to or combined with.
: Yields or produces.

9. (g): in gaseous state
(l): in liquid state
(s): in solid state
(aq): substance is dissolved in water
means heat is added