Download Atoms - Waconia High School

Atomic Structure
1.
2.
3.
4.
Parts of an atom
Periodic table & atoms
Scientific Atomic Models
Isotopes
Parts of an atom
Charge
Location
(+, -, 0)
Proton
Neutron
Electron
Quarks
Mass
Symbol
Parts of an atom
Protons & Neutrons =
_______________
Parts of an atom
Quarks
• 6 types
• Up & Down most
common  stable
• 3 quarks = 1 proton
or 1 neutron
He
Periodic table & atoms
• Atomic Number = number of protons
• A# Carbon =
• Atomic Mass/Weight = number of
protons + neutrons
• Atomic Mass Carbon =
• How do you determine # of neutrons?
• How can you determine # of electrons?
(hint: e- have opposite charge of p+)
Periodic Table & Atoms
Writing Chemical Formulas
•
•
Subscript = # of atoms in compound
Parentheses = distribute to those inside
C6H12O6
Cu(NO3)2
Scientific Atomic Models
1. _____________
•
•
Electrons are held in energy levels
Energy levels can hold specific amounts of e-
1 = 2 e2 = 8 e3 = 18 e-
Scientific Atomic Models
1. Bohr Model
•
•
•
Electrons can gain and lose energy
When gain  electron jumps to higher level
When lose  _____________________________
1 = 2 e2 = 8 e3 = 18 e-
Drawing Bohr Models
Lithium - 7
Nitrogen - 14
Sulfur - 32
Scientific Atomic Models
2. Electron Cloud Model
•
•
Electrons are not in FIXED orbits
Location of e- determined by ___________________
Higher probability
of finding an e-
Nucleus
Scientific Atomic Models
2. Electron Cloud Model
•
•
•
High probability spots = ____________________
Each orbital can hold 2 eMultiple orbital per energy level
Higher probability
of finding an e-
Nucleus
Scientific Atomic Models
2. Electron Cloud Model
•
•
Each orbital can hold 2 eMultiple orbital per energy
level
Energy Level 1
Energy Level 2
How many electrons?
How many orbitals?
Isotopes
Nitrogen - 14
Nitrogen - 15
Elements with the
SAME number
protons & electrons
but have a
DIFFERENT number
of neutrons