1. 1.1 The Puzzle of Matter Objectives
Classify matter according to its composition.
Distinguish between elements, compounds, homogeneous mixtures, and heterogeneous mixtures.
Relate the properties of matter to structure.

2. Chemistry
Textbook Definition the science that investigates and explains the structure and properties of matter.
Macroscopic level of matter—based on behavior and observed composition of matter
Submicroscopic level of matter—used to determine how the hidden structure of matter influences its behavior

4. Matter
Definition: is anything that takes up space and has mass. Examples: Non examples:

6. Matter can be classified as a…
A Pure Substance
matter with the same fixed composition and properties.
Pure means that every bit of the matter being examined is the same substance.
Examples:
Mixture
is a combination of two or more substances in which the basic identity of each substance is not changed.
Can be separated by physical processes (aka physical changes)
Examples:

7. Pure Substance vs. Mixture

8. Mixtures can be classified as..
Heterogeneous: does not have a uniform composition and its individual substances remain distinct.
Homogeneous: always has a uniform composition and is the same throughout.
Can be liquid or solid
Alloys: solid solution that contains different metals and sometimes nonmetallic substances.
AKA: solutions

9. Heterogeneous vs. Homogeneous

10. Solutions Made up of: The solute is the substance being dissolved.
The solvent is the substance that dissolves the solute.
When the solvent is water, the solution is called an aqueous solution.

13. Pure Substances can be classified as….
Elements
An element is the simplest form of matter
There are 117 elements—only 90 occur naturally on Earth.
The periodic table organizes elements and uses chemical symbols that are universally understood.
Represented by: Chemical Symbol
Compounds
A compound is a chemical combination of two or more different elements joined together in a fixed proportion
Represented by chemical formula-show what elements make up a compound and the number of atoms of each element.
Molecule- smallest unit of a compound

14. Element vs. Compound vs. MoleculeZn
H2O
SO2 S