Honors Chemistry
Name: ________________________________________ Date: ________________ Mods: ________
Topic: ___________________________________________________________________________
Group Members: ___________________________________________________________________
Chapter 7: Periodic Properties and Trends
Objective:
To work in teams to develop power point slides and handouts to teach the material presented in
chapter seven.
Group Assignments:
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Development of the periodic table and Effective Nuclear Charge
Sizes of Atoms and Ions
Ionization Energy
Electron Affinities
Properties of Metals/Non-metals/Metalloids
Group Trends of active metals and of selected nonmetals
Overview:
Each group will be given specific requirements describing the format and material that must be
included in their presentation. You will be given three class periods to develop a power point
presentation, a way for the class to take notes, a review activity/game, and a 5 question
homework assignment of your topic. Notes/handouts should be completed by the end of the period
on day three so that material can be electronically submitted to me for copying. I will review your
notes/handouts and reserve the right to edit the material if need be. Notes/handouts will be compiled
into a packet and copied for each class member.
You will also need to prepare a power point presentation of your topic. Plan on having a presentation
that runs for approximately 15-20 minutes (this time must include your review activity). Remember,
you’re the expert and your classmates are depending on you to give a thorough explanation of the
topic. It is encouraged that you involve the class!!! Anticipate that your classmates may have
questions for you and be prepared to offer them an answer.
1. Development of the Periodic Table (7.1) and Effective Nuclear Charge(7.2):
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Document the historical development of the periodic table.
Identify scientists credited for arranging and classifying elements.
Describe the current organization of the periodic table.
Describe forces of attraction/repulsion in many electron atoms.
Define effective nuclear charge and explain its significance.
Define electron shielding (screening) and S, the screening constant.
Document trends in effective nuclear charge as they occur across a period and down a
column in the periodic table.
2. Size of atoms and ions (7.3):
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Define atomic radius, distinguishing between non-bonding and bonding radii.
Identify periodic trends (across a period, down a group) of atomic radius, including an
explanation.
Identify trends in ionic radii and explain.
Define isoelectronic series and explain observed trends.
Provide a graph plotting the atomic radius for the first three periods of elements on the
periodic table in your handout.
3. Ionization Energy (7.4)
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Define ionization energy
Distinguish between 1st and 2nd ionization energy.
Identify periodic trends for 1st ionization energy.
Highlight at least one irregularity to the trend and explain.
Describe electron configuration of ions.
Provide a graph plotting 1st ionization energy for the first three periods of elements on
the periodic table in your handout.
4. Electron Affinities/Electronegativity (7.5 & pg. 312)
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Define electron affinity and distinguish its differences from ionization energy.
Explain the trends for electron affinity.
Define electronegativity and relate it to electron affinity.
Plot graphs for electronegativity and electron affinity for the first three periods of the
periodic table in your handout.
5. Properties of Metals/non-metals/metalloids (7.6-7.8)
Group Trends of active metals and selected nonmetals
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Define properties of metals and relate to periodic trends.
Describe ionic compounds and properties of metal oxides.
Define properties of nonmetals and relate to periodic trends.
Define properties of metalloids and give several examples.
Define property, trends and applications of alkali metals.
Define property, trends and applications of alkaline earth metals.
Define property, trends and applications of selected nonmetals, including
hydrogen, oxygen, the halogens and the noble gases.