1. Chapters 3 Notes
Matter
2.2 lbs = 1 kg
1 kg = 9.8 N

2. I.Classes of Matter
-Matter exists as elements, compounds, mixtures, or solutions
*Homogeneous matter:
identical properties throughout.
Ex: salt h20

3. *Heterogeneous matter:
different properties
Ex. Fruit salad, shovel of dirt

4. II. Mixtures
pp41
*two or more substances mixed together but not chemically combined.

5. A. Properties of Mixtures
-substances keep their separate ident and most of their own prop.
-may chng in physical appearance.
Ex. Sugar and water, mp, bp

6. -subst can be present in any amnt.
-subst can be separated out.

7. B. Types of Mixtures 1.Heterogeneous mixture
*particles are large enough to be seen and settle out.
EX: concrete

8. *particles very small and do not settle out. EX: Stainless steel
2. Homogeneous mixture
*particles very small and do not settle out.
EX: Stainless steel
#6(homo and hetero mixtures)

9. *Colloids:
Larger particles but left in suspension
Ex: smoke,

10. C. Solutions *one substance dissolves in another.
Ex. Ocean water, tea, air.

11. -3 Important Prop of Solutions
1.part not large enough to be seen
2.part. are evenly spread out(all parts of sol are ident)
3.solution doesn’t settle out of time

12. *Alloy:
solids dissolved in solids
ex: brass, sterling silver
DEMO

13. III. Elements *Pure Subst:
made of only one kind of material and has definite prop
*Element:
simplest pure subst. ;
cannot be chngd into simpler subst by heating or any chem process
-Ex

14. A.   Elements and Atoms
pp39
*Atom:
smallest particle of an element with the prop. of that element.

15.  B. Chem Symbols
*represent elements

16. *two or more elements chem. combined. Ex: sugar, baking soda, TNT
IV. Compounds
pp40
*two or more elements chem. combined.
Ex: sugar, baking soda, TNT

17. A compound is two or more elements combined together.
This is a picture of a salt compound.

18.  -Can be broken down into simp subst.
>by heating, electricity

19. -The prop of a cmpnd are very diff from the prop of the elements in it.

20. *Molecules:
2 or more atoms chem. bonded together.
-smallest particle of a cmpnd that has all the prop of that cmpnd.

21. A molecule is the smallest particle of a substance that exists alone.
This is a picture of a water molecule. It is two parts hydrogen and one part oxygen.

22. *Chemical Formulas:
1. What it is
2. How much

23. Chemical equation: description of a chem
 *Chemical equation: description of a chem. rxn using symbols and formulas.

24. Chemical equation:
What you put in
What you get out
How much

25. *Law of conservation of mass:
*Law of conservation of nrg:
*nrg: ability to do work
pp77

26. *Diatomic Molecules: (super 7)
Br, I, N, Cl, H, O, F

27. *Chemical Rxn:
1. Bubbles
2. Formation of a precipitate
3. Heat and light given off
pp184