Transcript Atomic Theory (Or a quick Chemistry Review)

Atomic Theory
(Or a quick Chemistry Review)
Atomic Theory
Q: What does science study?
A: The natural world, the physical universe
Q: What are the components of the P.U?
A: matter, energy, forces
“Flavors of Atoms”
(But which are “atoms of life”?)
 Worksheet review
“Guts” of Atom
Name
Location
Charge
Proton
Nucleus
Neutron Nucleus
Electron shell, E level
+1
0
-1
Mass
1 amu
~ 1amu
~1/2000 amu
Vocabulary
number (Z) –
 Atomic mass (M)
 Atomic
 Valence
electrons –
rule –
 “bus-seat” rule
 Octet
How to Build an Atom
1)
2)
3)
Determine Z
Add neutrons
Add electrons
(# electrons = # protons)
Rules:
* Add up to 2 e to 1st E level
* Add up to 8 e to 2nd E level
* Add up to 8 e to 3rd E level …….
Draw oxygen
 Atomic
#=?
 Atomic mass = ?
 # of valence electrons?
 Stable?
Draw P, H
 Atomic
#=?
 Atomic mass = ?
 # of valence electrons?
 Stable?
Why do atoms bond?
 (For
the same reasons humans do??
 To
become “happy”!
 To become more stable..
 NOTE:
ATOMS LOSE THEIR INDIVIDUAL
IDENTITY WHEN CHEMICALLY
BONDED TO FORM MOLECULES