1. Matter Class #4 Objective: Particle Diagrams for solids, liquids, gases, atoms, molecules, compounds, and mixtures. Then finish up Lab # 5,6, and 7. Lots of drawing today, get paper, put on thinking hats. Matter HW #2 due Friday.

2. A particle diagram shows the idea of chemical substances in a cartoon sort of way. The diagrams are not realistic in shape, but with some imagination and thinking, you can understand what they are going to show. You need to be aware of these vocabulary words to move forward. Think, or ask now. SOLID – LIQUID – GAS ATOM – COMPOUND – MIXTURE – DIATOMIC ELEMENTS These diagrams will show all seven of these, you need to be able to recognize them, and draw examples of each of these seven.

3. Atoms, diatomic elements, molecules… which are which?

4. molecules atoms diatomic elements

5. 2 kinds of atoms Maybe H 2, O 2, N 2, Cl 2, etc. These might be CO 2 These might be NH 3

6. Particle diagrams show atoms, diatomic elements, or molecules. They can also show phases, depending upon how the particles are arranged in the box. LEFT TO RIGHT: Gas particles don’t touch and “float” in space. Liquids are at the bottom, but not arranged orderly. Solid matter has particles in a very orderly pattern, that does not conform to the shape of the container.

7. Could this be Ammonia NH 3 Carbon Dioxide CO 2 Water H 2 0 Methane CH 4 Could this be Phosphorous pentachloride PCl 5 Carbon Monoxide CO Sulfur trioxide SO 3 Butane C 2 H 6

8. When 4.0 g hydrogen combines rapidly with 32 grams of oxygen in the air to form into wata, how many grams of this dihydrogen monoxide form?

9. 36 grams of course Matter cannot be created or destroyed in a chemical reaction, or physical change. 4.0 g + 32 g = 36 g

10. A.Atoms only B.Atoms and molecules C.Molecules only D.Diatomic elements E.A mixture F.A compound Which of these could be in the box? H 2, He, CO 2, H 2 O, CO, CH 4

11. Which of these could be in the box? H 2, He, CO 2, H 2 O, CO, CH 4 That is an atom, could be He, or any other single atom. That is a compound with a 1:1 ratio, maybe CO This is a diatomic element, maybe H 2

12. Read the MATTER BASICS tonight. Notes due by MONDAY. Matter HW #2 due on Friday.

13. Co, Ne, Hg, H 2 O, Au, and Mg are the substances we will use for these questions: 1. which has the highest boiling point? Cobalt at 3143 K which is 2870 °C 2. Which will expand the most when heated? The gas neon 3. Which can be compressed the most? The gas neon 4. Which are the least likely to be compressed? Cobalt, mercury, water, gold, and magnesium (gases compress easily) 5. Which will melt in your mouth? Only the water 6. Which will fit into any shape container you place it (at 25°C) neon gas, or liquid water 7. Which will FILL any container you place it into (at 25°C) The gas neon How many atoms are in each of these compounds? H 2 SO 4 7 C 6 H 12 O 6 18 NaCl 2 H 3 PO 4 7 C 10 H 22 32 CH 4 5 KI 2