NAME:_______________________
3.7 How do I draw a planetary model of the atom?
DATE:____________
AHS Instructor Ms. Kasia Room 109/110
UNIT 3 ATOMIC CONCEPTS
3.7 How do I draw a planetary model of an atom?
AIM:
DO NOW: How many protons, neutrons and electrons are present in K-49?
REVIEW OF ELECTRONS
Subatomic Particle
ELECTRON SHELL
Definition
Charge
Location
More Information
ENERGY LEVEL
Example
ELECTRON CONFIGURATION
Definition
Example
Notation
Mass
# OF ELECTRONS
HOW DO I DRAW A PLANETARY MODEL OF AN ATOM?
CARBON
ELECTRON
CONFIGURATION
PLANETARY MODEL
OF THE ATOM
WHAT ARE VALANCE ELECTRONS?
Definition
Picture
Notation
Why Important?
Finish the worksheet attached and submit it at the end of the period to receive credit for today’s class.
NAME:_____________________________
3.7 How do we draw models of each atom?
DATE:________
AHS Instructor Ms. Kasia Room 109
UNIT 3 ATOMIC CONCEPTS
3.7 Electron Configuration
VALANCE ELECTRONS
1. How many valance electrons does PHOSPHORUS HAVE?
a. The electron configuration of phosphorus is 2-8-5
b. The last number in the electron configuration is ______________.
c. Therefore, the number of valance electrons in phosphorus is _________________.
Directions: Write how many valence electrons are found in each of the following elements
Hydrogen (H)
Helium (He)
Carbon (C)
Oxygen (O)
Fluorine (F)
Neon (Ne)
Lithium (Li)
Beryllium (Be)
Silicon (Si)
Sulfur (S)
Chlorine (Cl)
Argon (Ar)
Sodium (Na)
Magnesium
(Mg)
Germanium
(Ge)
Selenium (Se)
Bromine (Br)
Krypton (Kr)
Potassium (K)
Calcium (Ca)
Tin (Sn)
Tellurium (Te)
Iodine (I)
Xenon (Xe)
1. What do you notice about the number of valence electrons of elements in the same column (GROUP)
of the periodic table?
2. Do you think that makes the atoms in one column similar to one another?
3. Based on your answer to #2, which of the following is chemically similar to CALCIUM (Ca)?
a. Mg
c. Mn
b. K
d. Zn
4. How did you choose your answer to #3?__________________________________________________
5. Explain in terms of atomic structure, why germanium is chemically similar to tin.
Directions: For each: draw a PLANETARY MODEL, find atomic #, # of valance e- and the e- configuration.
Boron
Atomic Number:
Valence Electrons:
Electron
Configuration:
Nitrogen
Atomic Number:
Valence Electrons:
Electron
Configuration:
Potassium
Atomic Number:
Valence Electrons:
Electron
Configuration:
Neon
Atomic Number:
Valence Electrons:
Electron
Configuration:
If time Permits…
Calcium
Atomic Number:
Valence Electrons:
Electron
Configuration:
Silver
Atomic Number:
Valence Electrons:
Electron
Configuration: