1. CLASSIFYING MATTER

2. S1-2-09 Compare elements to compounds.
S Interpret chemical formulas of elements and compounds in terms of the number of atoms of each element.
Vocabulary & People
Pure Mixture Compound
Molecule Diatomic
Heterogeneous Homogeneous
Formula Subscript Coefficient

3. Anything that has mass and takes up space, or volume.
Matter:
Anything that has mass and takes up space, or volume.

4. Pure
Every particle that
makes up a substance
is the SAME.
Mixture
Substance contains
more than one kind
of particle.

5. Smallest particle of an element - atom 2. Compounds
PURE
Elements
Simplest form matter
Smallest particle of an element - atom
2. Compounds
Two or more elements chemically bonded
Smallest particle of an element – molecule
A bucket of gold atoms (Au) and a bucket of water molecules (H2O) are both PURE since in both cases there is only ONE type of particle

6. Element:
Sodium – all pure sodium atoms
Compound:
Salt – all pure sodium chloride molecules
It’s possible to have compounds of the same atoms:
Called diatomic (two atoms) molecules
Oxygen gas – O2
Hydrogen gas – H2

8. Heterogeneous
Particles are not evenly distributed
Particles can be separated physically
Sand and water
Pizza
Bubble tea

9. Homogeneous
Particles are evenly distributed – “solution”
Cannot physically separate different particles
Salt and water
Coke
Cheese

10. + Shows type and amount of each atom present in a compound
Chemical Formula
Shows type and amount of each atom present in a compound H O +
subscript

11. 3 H2O 1 6 atoms (3 x 2) of hydrogen and 3 atoms of oxygen
Subscripts – how many atoms (of an element) in a compound
Coefficient – how many molecules present H O H O H O 3
H2O 1
coefficient
6 atoms (3 x 2) of hydrogen
and 3 atoms
of oxygen
form 3 molecules of water.

12. Compound
Coefficient
Total of each element
KHCO3 1
K – 1 H – 1
C – 1 O – 3
AlCl3 3
Al – 3 Cl – 9
CBr4 6
C – 6 Br – 24
H2SO4 5
H – 10 S – 5
O – 20
C11H22O12 4
C – 44 H – 88
O – 48 1 3 6 5 4

13. 1000 kg
1000 kg

14. In any chemical reaction matter cannot be created or destroyed.
Law of Conservation of Matter:
In any chemical reaction matter cannot be created or destroyed.
Atoms will rearrange to form new compounds, but the number and type of atoms will not change during the reaction

15. CAN YOU ANSWER THESE QUESTIONS? S1-2-09
How do you classify matter using the words: element, compound, atom, molecule, mixture and pure?
S1-2-10
How do you use a formula to find the elements in the molecule and the number of atoms of each element?
Vocabulary & People
Pure Mixture
Compound Molecule Diatomic
Heterogeneous Homogeneous
Formula Subscript Coefficient