Atomic Structure Electron/Proton/Neutron 4 Atom Dudes Guess at What an Atom Looks Like Calculating Electrons, Protons, and Neutrons.

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Presentation transcript:

Atomic Structure Electron/Proton/Neutron 4 Atom Dudes Guess at What an Atom Looks Like Calculating Electrons, Protons, and Neutrons

Subatomic Particles Each atom of an element is composed of 3 different subatomic particles: =Electrons=Protons=Neutrons

Electron Smallest of 3 particles Negative Charge

Proton Positive Charge + # of Protons NEVER CHANGE

Neutron No Charge N

4 Atom Dudes John Dalton J.J. Thomson Ernest Rutherford Neils Bohr

John Dalton: 4 Atom Concepts 1 st – All elements composed of atoms

John Dalton: 4 Atom Concepts 2 nd – Same element have same mass, different element different mass

John Dalton: 4 Atom Concepts 3 rd – Compounds contain more than 1 element

John Dalton: 4 Atom Concepts 4 th – atoms in compounds always form the same way

What Dalton Thought Hard Solid Sphere (Bowling Ball)

Dude #2 = J.J. Thomson Discovered the electron and its charge was negative (-)

Thomson ‘bend’ experiment

Thomson – Atom Looks Like PLUM PUDDING/Chocolate Chip Ice Cream

Dude #3 = Ernest Rutherford Discovered the nucleus and it has a positive (+) overall charge

Rutherford Experiment – Gold Foil

Rutherford – Atom Model

Neils Bohr Electrons orbit the nucleus in energy levels (Like planets orbiting sun)

Bohr Model

Modern Day Atom Model Electron Cloud Model

Heisenberg Uncertainty Principal I know where you are But not how fast you are going I know how fast you are going But I don’t know where you are

How do we find the number of electrons, proton, and neutrons in an atom? The periodic table tells us all of this!!

Ca Calcium

Ca Calcium Top Number = Atomic Number

Ca Calcium Top Number = Protons (+)

Ca Calcium Top Number = Electrons (-)

Ca Calcium Bottom Number = Atomic Mass

Ca Calcium Sum of Protons + Neutrons

Simple Math Atomic Mass = Protons + Neutrons Neutrons = Atomic Mass - Protons

Keep it simple Round the atomic mass (bottom number) when using it.

How many electrons does Calcium Have? Ca Calcium

How many protons does Calcium have? Ca Calcium

How many neutrons does Calcium have? Ca Calcium

40 – 20 = 20 Neutrons

Sum it Up Electrons = Top Number (Atomic Number) Protons = Top Number (Atomic Number) Neutrons = Bottom Number (rounded) – Top Number

Sample: Find E/P/N of Carbon (C) Electrons = 6 (top) Protons = 6 (top) Neutrons = 12 – 6 = 6

Sample: Find E/P/N of Aluminum (Al) Electrons = Protons = Neutrons =

Worksheet