1. Elements, Compounds, States of Matter

2. All matter is made of atoms.
Atoms are the smallest unit of an element that maintain the properties of that element.

3. All matter can be classified as…
Element
Compound
Mixture

4. Elements Elements are made of only one type of atom
Can be metals, nonmetals, metalloids
Elements are listed on the periodic table

6. Compounds can be broken down into their elements by a chemical change
Compounds are made of two or more elements that are chemically combined
Compounds can be broken down into their elements by a chemical change

9. Pure Substance
A substance with definite physical and chemical properties
Pure substances are made up of just one type of particle
Elements and compounds are pure substances
Physical changes such as melting, freezing, cutting, or smashing do not change the identity of pure substances.
When a pure substance undergoes a chemical change, it is no longer that same substance.

10. Examples of Pure Substances
oxygen (O) salt (NaCl)
water (H2O)
iron (Fe)

12. Mixtures
Mixtures are made of different elements and/or compounds that are not chemically combined.
Mixtures can be separated through physical changes.
Mixtures are not pure substances and do not have definite properties.
Substances within a mixture keep their identities and individual properties.

17. Examples of Mixtures Suspensions are heterogeneous mixtures.
Particles in a suspension are spread throughout a liquid or gas, but are too large to stay mixed unless shaken or stirred.
Particles settle in suspensions

18. Examples of Mixtures
A solution is a homogeneous mixture in which one substance is dissolved in another substance.
Solute- the substance that dissolves
Solvent- the substance that something dissolves into
Solute + Solvent = Solution

20. Examples of Mixtures
Colloids have particles that are unevenly spread throughout the mixture. (looks homogenous but really heterogeneous)
particles in colloids are too small to settle out of the mixture