1. Physical Properties
– each element and compound has a unique set of properties.
Physical property – a characteristics of matter that you can observe without changing the identity of the matter.
Physical Properties include:
Melting Point Conductivity
Mass Boiling Point
Volume Density
Solubility States of Matter

2. Size-dependent properties - depends on how much matter is in the sample.
Mass and Volume are both size-dependent properties.
Mass – the amount of matter in an object – Size dependent
Example: Mass of a large dumbbell made of iron versus a small dumbbell
made of iron.
Remember that mass and weight are two different measurements.
Mass = measures the amount of matter in an object
Weight = measures the amount of gravitational force on an object.
Example: On the moon the mass of the person would not change, the weight of the person on the moon would change because there is less gravity.

3. Volume – the amount of space an object takes up
Volume – the amount of space an object takes up. This is another physical property that depends on size.

4. Size-Independent Properties - do not depend on the amount of matter present.
properties are the SAME for both large and small samples.
Examples:
States of Matter
Melting Point
Boiling Point
Density
Solubility
Conductivity

5. States of Matter
States of matter (solid, liquid, gas) are physical properties of matter.
The state of matter of a substance depends 2 things:
1. How close the particles in matter are to one another.
2. How quickly they are moving.

6. Melting Point/Boiling Point
Melting Point – temperature at which a substance changes from a solid to liquid.
Boiling Point – temperature at which a substance changes from a liquid to a gas.
Example: boiling point of water = 100 °C
Notice that the boiling point is 100 °C no matter what the size of sample.

7. Density – the amount of matter (mass) in a given volume of a substance.
The density of pure gold is 19.3 g/cm3 no what size sample of gold you have.
Conductivity
- Electrical conductivity is the ability of matter to conduct an electric current.
Ex: Copper is often used in electrical wire because it has a high electrical conductivity.
- Thermal conductivity – is the ability for a material to conduct thermal energy.
Ex: Stainless Steel is used for pots and pans because it has a high thermal conductivity.
-Metals tend to have a higher electrical and thermal conductivity.

8. Solubility- the ability of a substance to dissolve in another.

10. These are all physical properties of matter: