1. Elements, Compounds Or Mixtures Exploration LT: I can create and classify elements, compounds and mixtures.

2. Procedures 1.Use white marshmallows and toothpicks to make 6 molecules of oxygen (O 2 ) and place them on the paper labeled O 2 Element. 2.Use yellow marshmallows and toothpicks to make 4 molecules of hydrogen (H 2 ) and place on the paper labeled H 2 Element. 3.Use orange marshmallows to make 4 atoms of carbon (C) and place on the paper labeled C Element. 4.Draw and label pictures of your models in your notebook.

3. Analysis 1.What do the three areas have in common? 2.Define the term element in your own words. 3.What other elements can you make with your marshmallows?

4. Procedures 5.Use pink and green marshmallows and toothpicks to make 6 molecules of salt(NaCl) and place them on the paper labeled Salt (NaCl) compound. 6.Use yellow and white marshmallows and toothpicks to make 6 molecules of water (H 2 O) and place on the paper labeled Water H 2 O Compound. 7.Draw and label pictures of your models in your notebook.

5. Analysis Look at the two areas labeled Compounds and answer the following: 4.What two things do the area contents have in common? 5.Define the term compound in your own words. 6.What other compounds can you make with your marshmallows?

6. Procedures 8.Take 2 molecules of NaCl and 2 molecules of H 2 O and place them on the paper labeled Salt Water (H 2 O + NaCl) Mixture. 9.Take 2 molecules of O 2 and 2 molecules of H 2 O and place on the paper labeled Dissolved Oxygen (H 2 O + O 2 ) Mixture. 10.Draw and label pictures of your models in your notebook.

7. Analysis Look at the two areas labeled Mixtures and answer the following: 7.What do the area contents have in common? 8.Define the term mixture in your own words. 9.What other mixtures can you make with your marshmallows? 10.In your own words, what is the difference between elements, compounds, and mixtures?

8. Extension 11.Explain the analogy: An element is to a compound as a letter is to a word. 12.Complete your own analogy: Elements and compounds are to mixtures as ____________ and ____________ are to ________________________.

9. Formula Mass Each atom has a unique mass (on the periodic table). The masses are different for atoms of different elements. Each molecules must also have a mass that depends on both its chemical formula and the mass of its individual atoms. Use your diagrams and chemical formulas to calculate the mass of each of the molecules you built. Record the masses near the drawings of each model you made.