Smallest unit without subatomic level
Atom
More than one atom
Molecule
4 types of PROPERTIES
1) Physical 2) Chemical 3) Intensive 4) Extensive
Physical Properties
measured without changing substance's identity and composition
Examples of Physical Properties
mass, texture, state, colour, density, boiling point..
Chemical Properties
Observed when substance is changed into another (reacts)
Examples of Chemical Properties
flammable, reactivity with acid, corrosiveness..
Intensive Properties
DO NOT depend on amount of sample examined
Examples of Intensive Properties
temperature, melting point...
Extensive Properties
DEPEND on amount of sample present
Examples of Extensive Properties
mass, volume...
2 types of CHANGE
1) Physical Change 2) Chemical Change
Examples of Physical Change
change in state volume quantity temperature
Examples of Chemical Change
forms new suabstance release/absorb heat combustion oxidation decomposition
Physical Changea Changes ___, not ____.
changes appearance, not composition
Density = ?
mass/volume
0 Kelvin = ? Celsius
273.15 Celsius
Celsius -> Fahrenheit EQUATION
C = 5/9(F-32)
Fahrenheit -> Celsius EQUATION
F = 9/5(C) + 32
Deci = 10^?
-1
Kilo = 10^?
3
Mega = 10^?
6
Peta = 10^?
15
Tera = 10^?
12
Giga = 10^?
9
Centi = 10^?
-2
Milli = 10^?
-3
Micro = 10^?
-6
Nano = 10^?
-9
Pico = 10^?
-12
