Download Name: Date: Performances of Understanding:

Name: _______________________
Date: _______________________
Learning Target:
Performances of Understanding:
I can explain the core, valence, radius (CVR) periodic table.
-I will listen attentively while taking notes in
Cornell format.
-I will work collaboratively with the class to model
atoms in CVR format using pool noodles
-I will work independently to create a periodic
table in CVR format that explains how the
elements are classified based on their physical
and chemical means.
Criteria for Success:
I can determine the effective core charge (effective nuclear charge) for any
main group element on the periodic table.
I can determine the number of valence electrons for any main group element
on the periodic table.
I can depict the relative atomic radius of any main group element on the
periodic table.
I can represent any main group element in CVR format.
Notes
Use this section of your
notes to write questions,
make connections, and
sketch what you are
visualizing!
The CVR Periodic Table
A. The core, valence, radius (CVR) model separates the ___________ level electrons from the
_________ level electrons.
1. To determine the effective nuclear charge (Zeff) on an electron, subtract the number
of ___________ shell electrons from the number of _______ in the nucleus.
a. Effective nuclear charge is also referred to as effective ________ charge.
2. The _____________ level is the __________________ level of electrons and is most
important in determining an atom’s chemistry.
3. The atomic____________ of an atom is the distance from the center of the
____________ and outer edge of the ___________ _________.
a. The atomic radius is determined in large part by the pull of the positive
___________ in the nucleus and the number of main _________ levels.
B. The resulting model simplifies the depiction of the atom and focuses on the _________
electrons which directly affect the _____________ of the atom.
¿Qué Dijo?
Guided Practice
Sodium
Sodium
Potassium
Unit Four 80
Neon
1. What is the relationship between group number and the number of valence electrons?
2. What is the relationship between group number and the charge on the atomic core?
©Ross Lattner Publishing
Unit Four 81