Upload
e045911
View
129
Download
0
Embed Size (px)
Citation preview
Atoms
Rutherford
BOHR MODEL: The structure of an atom.
Atomic Mass= Protons + Neutrons
Nucleus Charge is Positive
Positive Protons +
Neutral Neutrons 0
Negative Electrons -
P rotons (positive)
E lectrons (negative)
N eutrons (neutrons)
Ve Valence Electrons
Periodic Table Groups- similar properties of element
Groups = Valence Electrons (1A, 2A, 3A, 4A, 5A, 6A, 7A, 8A)
Valence Electrons= Reactivity
Period- # of energy levels are
in an atom.
Chemical Equations
Law of Conservation of Mass- Total of atoms on the reactants must equal the product
2Na + 2H20 => 2NaOH + H2
REACTANTS PRODUCTS
YIELDSIGN
Reactants are to the left of the yield sign
Products are to the right of the yield sign
Counting Atoms
Coefficient- the # of molecules
# of atoms of each element
If no subscript, there is at least 1
atom of that element
Ca - 1 x 2 = 2 atomsC- 1 x 2 = 2 atomsO- 3 x 2 = 6 atomsTotal = 10 atoms
Chemical Changes NEW SUBSTANCE CREATED
Physical Changes
MORE MASS
MORE INERTIA
LESS MASSLESS INERTIA
Newton’s Third LawEXAMPLE...
FOR EVERY ACTION….
THERE IS AN EQUAL AND OPPOSITE REACTION...
FORMULA FOR SPEED/DISTANCE/TIME