1. Properties & Changes of Matter Notes
Friday, August 4th, 2017

2. Properties of Sodium (Na)
Silvery Grey Color
30 grams
Atomic Mass: g/mol
Melting Point: 97.5°C
Can cut it with a knife
When exposed to air and cut loses it’s grey color
Has 3 isotopes
Boiling Point: 883 °C
Density: 0.97g/cm3
Each flake is 4.21cm long
Reacts quickly with water, snow, ice (highly explosive)
Reacts with chlorine to form table salt
Properties of Sodium (Na)

3. Exposed to air, loses color Highly explosive in water
Physical Properties
Chemical Properties
Grey Color
30 grams
Atomic Mass
Melting Point
Boiling Point
Density
3 isotopes
Cut with knife
4.21cm flakes
Exposed to air, loses color
Highly explosive in water
Reacts with chlorine to form table salt

4. Physical Change
Physical properties (appearance) can change while the composition remains the same.
A change in size, shape, or state of matter in which the identity remains the same is called a physical change.

5. Chemical change
A change of one substance into another is a chemical change.
Burning a log
Formation of rust on a nail
Rotting eggs
Putting alka-seltzer in a glass of water
****Look for clues such as heat formation, the formation of bubbles/solids in a liquid, smell, or color change

7. Base on the previous notes classify the following as a physical property, physical change, chemical property, chemical change:
a)     Evaporation of water
b)    Tearing paper
c)     Burning paper
d)    The fact that water is a liquid
e)    The fact that wood can burn

8. a) Evaporation of water - physical change
Base on the previous notes classify the following as a physical property, physical change, chemical property, chemical change:
a)     Evaporation of water - physical change
b)    Tearing paper - physical change
c)     Burning paper - chemical change
d)    The fact that water is a liquid - physical property (intensive)
e)     The fact that wood can burn - chemical property
*** Check online tonight for more review/practice identifying properties & changes***