Chemistry Guided Notes – Atomic Structure, Orbitals and the Quantum Model
Unit 2 Day 2
Name: _______________________________
Class Period______
Objective: SWBAT Categorize electrons by energy levels, sublevels, and orbitals using the atomic model and create Bohr models
and atomic diagrams using knowledge of electron energy levels (SC.912.P.10.9)
Essential Question: What does the quantum mechanical model determine about the electrons in an atom?
Bohr Model
___________________: (1913) proposed that an electron is found only in specific circular paths, or ____________, around the
nucleus. Each electron has a fixed ________________ _____________________
Steps to draw a Bohr Model
1. Draw a small circle in the center to represent the ________________ and write the elemental symbol and number of
________________ and ________________.
2.
Draw a larger circle around the nucleus circle to represent the _______________ _______________ level for electrons.
3.
Add more circles outside to include all of the energy levels you need. The number of circles for the atom will be the same
number as the ____________________________________.
4.
Add electrons, as small dots, to each energy level as allowed until you have the proper number of electrons. The number
of electrons you add will be equal to the ___________________ _____________________.
Example: Draw a Bohr Model for Carbon and Silicon
Energy Level
Number of
Carbon
Electrons
1
2
2
8
3
8
Sodium
Quantum Model
______________________________ model: the atomic model in which electrons are treated as waves, developed from
Schrodinger’s wave equation
Electrons move around the nucleus at certain _________ ______________ (Bohr was right!)
-
Within these levels we have _______________ or energy ________________, which are regions where an electron is
______________________________________________________________
Key Vocabulary
_______________________________: describes the electron’s probable location
______________________________________-: indicate the relative sizes and energy of atomic orbitals, there are 4 of these
numbers
-
ex:_______________________________________________
_____________________________________: describes the shape of the orbital, can be_____________________________
Chemistry Guided Notes – Atomic Structure, Orbitals and the Quantum Model
Unit 2 Day 2
Orbitals: Each orbital corresponds to a different ______________________
S orbital
1 orbital
p orbitals
3 orbitals
d orbitals
5 orbitals
Summary of Principal Energy Levels and Sublevels
Principal Energy Level
Number of Sublevels
f orbitals
7 orbitals
Type of Sublevel
Maximum number of electrons
n=1
2
3s (1 orbital), 3p (3 orbitals),
3d (5 orbitals)
4s (1 orbital), 4p (3 orbitals),
32
4d (5 orbitals), 4f (7orbitals)
Example: Carbon Quantum Model
1.
What is the energy level for carbon? ___________________________________________________________
2.
What sublevels are contained in the carbon atom? ________________________________________________
3.
What orbitals are related to each of these sublevels? ______________________________________________
4.
How many electrons are in each orbital and sublevel?______________________________________________
5.
Fill in the table below for Carbon:
Principal
Sublevels
Energy
Corresponding
Number
Number of Orbitals
of
Level
1 s orbital
2 s orbital
Electrons
n=1
1s
___________________
2
n=2
______
1 orbital
________
2p
________________
2
2p orbital
Independent Practice
Complete the following book problems on a separate sheet of paper: p.132 #1, 2, 3, 6 and 7; p. 152 #32, 33, 34, 37, 38
Homework:
1. Draw the orbitals for n = 1,2 and 3 and write how many electrons can be in that energy level
1. Draw the Bohr model for oxygen, sodium and silicon