Unit 3 – The Periodic Table and the Elements, Ch. 6
Introduction: Chemistry is a descriptive science. A significant aspect of Chemistry has to do with knowing the elements and how they behave. This takes experience and use of these elements. Students often ask me, “What does this element or compound do?” or “What is this used for?” Frequently, my response is: “I don’t know.” However, there are predictable similarities between elements’ chemical and physical properties. These similarities are related to their valence electrons. These periodic trends in the properties of elements lie behind the organization of the periodic table. In this unit we will learn about the periodic table, its history, structure and organization. We also will learn a little about some of these elements and the compounds they form. Your reading and writing will answer the questions of your classmates about these elements and help me to be able to answer the questions of future students.
Objectives:
Identify the contribution of Mendeleev and Mosley to the arrangement of the elements in the periodic table. (6.1)
State the Periodic Law. (6.1)
Explain why elements in a group have similar properties. (6.2)
Identify the s, p, d, f - blocks of the Periodic Table, and give their associated names. (6.2)
Give the special names for Groups 1A, 2A, 7A and 8. (6.2)
Define four important periodic trends, atomic size, ionic size, ionization energy and electronegativity. State the changes in these trends on the periodic table and give an explanation for these changes in terms of the structure and electromagnetic forces of the atom. (6.3)
Activities:
To learn about objectives 1-6:
· READ Chapter 6; pp. 154-180. See objectives for specific section.
·
WRITE answers to end of the chapter questions 27,
28, 30, 31, 33, 36, 37,
39 – 44, 48, 51, 52, 69 on pp. 181-183.
· KNOW the two group numbering systems.
· READ and PERFORM Lab activity, “Investigating Properties of a Family: Alkaline Earth Metals.”
· WRITE answers to questions for the Lab activity, “Investigating Properties of a Family: Alkaline Earth Metals.”
QUIZ on Ch. 6 and objectives 1-4 TBA Chapter 6 homework problems are due the same day.
Essay Assessment
· RESEARCH a particular element of your choosing.
· COMPOSE an essay. See below for details on the essay assignment.
· READ and EVALUATE three of your peers' essays using a internet based essay program called Calibrated Peer Review (CPR). This can be found at the following URL: http://cpr.molsci.ucla.edu/cpr/cpr/login.asp
Essay Requirements:
1. The essay can be a maximum of 300 words, no more.
2. In your research consult at least four different sources. At least two of these must be a book or periodical resource, i.e. not electronic source.
3. You must cite or footnote any ideas, information, or words, which you have taken from your sources. You should have at least one citation or footnote from three different sources.
4. Include a written evaluation of each website used. Web evaluation template.
5. Include a bibliography at the end.
6. You should be sure to discuss the element’s position on the periodic table in terms of family, period and block, the element’s abundance (in numerical terms that you understand), the element’s primary sources, some of its uses and any unique qualities or properties of this element.
7. The essay should be typed and double-spaced.
8. Submit a hard copy along with your bibliography and website evaluation on Friday, Oct. 26, 2007.
9. You will also submit a text only copy of this essay to the CPR website by the pre-arranged due date.
(Rev 10-17-07)
Due Date for the written submission of the essay Friday, Oct. 26, 2007. Due date for completion of essay evaluations: Thursday, Nov. 1, 2007.
