1. Build A molecule Workshop You will build new molecules from the given atoms and molecules. Put the atoms together by making their electron clouds touch. Bonds are when atoms are connected together. In chemical reactions, bonds are broken and atoms are rearranged making new substances.

2. Build A molecule Workshop  A chemical formula tells you how many atoms are in a molecule.  the 2 in H2O goes with the letter in front of it.  there are 2 Hydrogen atoms bonded to one oxygen atom

3. Name___________ Class_______ Period_____ Carbon dioxide: CO 2 A gas you exhale, burning stuff turns into it, dry ice

4. Name___________ Class_______ Period_____ Ammonia: NH 4 Smelling salts & cleaning products Nitrogen

5. Name___________ Class_______ Period_____ Water: H 2 O

6. Name___________ Class_______ Period_____ Silicon dioxide: SiO 2 sand, glass Silicon

7. Name___________ Class_______ Period_____ Methane: CH 4 Swamp gas & natural gas for stoves and furnaces

8. Name___________ Class_______ Period_____ Iron Oxide (Rust): Fe 2 O 3

9. Name___________ Class_______ Period_____ Sodium Chloride (NaCl) Table Salt

10. Name___________ Class_______ Period_____ Hydrochloric acid: HClStomach acid, brick-layers’ acid

11. Name___________ Class_______ Period_____ Hydrochloric Acid Solution/Mixture Look up the word solution Write your definition here

12. Name___________ Class_______ Period_____ Burning Ethane produces H 2 O and CO 2