3 Parts of the Atomic Theory
��������
Protons________
Neutrons________
Electrons________
6
C
Carbon
12
Atomic Theory
3 Parts of the Atomic Theory
��������
Protons___6___
Neutrons________
Electrons_________
6
C
Carbon
12
Atomic Theory
3 Parts of the Atomic Theory
��������
Protons___6___
Neutrons________
Electrons___ 6 ___
6
C
Carbon
12
Atomic Theory
3 Parts of the Atomic Theory
��������
Protons___6___
Neutrons________
Electrons___ 6 ___
6
C
Carbon
12
Atomic Theory
Mass – Protons = Neutrons
12 – 6 = 6
3 Parts of the Atomic Theory
��������
Protons___6___
Neutrons__ 6 ___
Electrons___ 6 ___
6
C
Carbon
12
Atomic Theory
Mass – Protons = Neutrons
12 – 6 = 6
3 Parts of the Atomic Theory
��������
Protons___6___
Neutrons__ 6 ___
Electrons___ 6 ___
6
C
Carbon
12
Atomic Theory
Mass – Protons = Neutrons
12 – 6 = 6
Subatomic Particles
Atoms are made of smaller pieces that are either in the center�of the atom called a nucleus or whirring around at such speeds�that atoms appear solid.
Electron small fast moving particles arranged by�energy levels: 2, 8, 8 ,8
Charge Negative 1
Mass basically 0
Energy Levels
Particles in the Nucleus
The nucleus contains two particles, although it is not actually a physical thing, more of a space that they inhabit.
Proton Large positive particle
Charge Positive 1
Mass 1 amu (atomic mass unit)
Neutron
Charge
Mass
Subatomic Particles
Particles in the Nucleus
The nucleus contains two particles, although it is not actually a physical thing, more of a space that they inhabit.
Proton Large positive particle
Charge Positive 1
Mass 1 amu (atomic mass unit)
Neutron Large neutral particle, keeps the Protons together
Charge No charge
Mass 1 amu
Subatomic Particles
Atom Models Through History
Dalton Model
Thomson Model
Rutherford Model
Bohr Model
Electron Cloud
Model
Molecules
Whole Number Ratios
How we Write them Co CO C6H8O7
Remember atoms symbols always begin with an uppercase letter
Physical and Chemical Properties
Models and Molecules
Molecules
Whole Number Ratios
How we Write them Co CO C6H8O7
Remember atoms symbols always begin with an uppercase letter
Then subscripts tells us how many of that type of atom are in a molecule so 7 Oxygens are in this molecule
Physical and Chemical Properties
Models and Molecules
Molecules
Whole Number Ratios
How we Write them Co CO C6H8O7
Remember atoms symbols always begin with an uppercase letter
Then subscripts tells us how many of that type of atom are in a molecule so 7 Oxygens are in this molecule
Physical and Chemical Properties
Describe the substance as it is (physical) or as it is being changed (chemical) into a new substance.
Physical Examples: Density, Colour, Volume, Elasticity, Luster
Chemical Properties: Heat of Combustion, flammability, toxicity, reactivity (acids, water, etc)
Models and Molecules
Proportions of Atoms to Molecules
Atoms are always smaller than molecules that include that type of atom
Carbon Dioxide Molecule
Carbon Atom (a small molecule, only 3 parts)
Large molecule
(every intersection of a line is another atom)
Proportions
Compound Materials
Watch this video on Composite (compound materials) https://www.youtube.com/watch?app=desktop&v=5w73zCQY1bQ&ab_channel=OneEnergy
Compound Materials
(Composite) materials combine the properties of�two materials to use their strengths together
Example: Traditional Recurve Bows, combined animal bone/horn and sinew.�The bone was very strong when compressed and the more elastic and high tensile strength�sinew would pull the bow back into shape. Without the sinew the bone would snap and without the�bone the sinew would just crumple up and not create tension.
Natural Materials
Any material found/created by anything other than humans that we have made a use for
Synthetic Materials
Any material that we made by modifying a natural�material. Sometimes the modification is very small �other times it is so drastic that the synthetic �material is unrecognizable from its natural material
Example: Chewing gum, yes it is made of plastic…�so it is made from oil!