LECTURE 8.1

LECTURE OUTLINE Weekly Deadlines Weekly Deadlines CRRA #4: Properties Concept Map CRRA #4: Properties Concept Map Lesson 08 Prototype Quiz Lesson 08 Prototype Quiz

SELF-REVIEW QUESTIONS Is the property adequately defined? Yes (2) The “property” is defined as “the ease with which sulfur can be burned in air to form the gas sulfur dioxide (SO 2 ).”

SELF-REVIEW QUESTIONS Is the importance of the property explained? Yes (2) The disinfectant and toxic nature of SO 2 are stressed.

SELF-REVIEW QUESTIONS Is the quality/quantity/magnitude of the property compared with the same property in similar materials? No (0)

SELF-REVIEW QUESTIONS Is the property related to or explained by the electronic/atomic structure in the material? No (0) There is no attempt to explain the properties of sulfur in terms of its structure.

SELF-REVIEW QUESTIONS Is the property related to or explained by the chemical bonding in the material? No (0)

SELF-REVIEW QUESTIONS Is the property related to or explained by the molecular/monomeric structure of the material? No (0)

SELF-REVIEW QUESTIONS Is the property related to or explained by the microstructure of the material? No (0)

SELF-REVIEW QUESTIONS Does the property explain/restrict the uses/applications of the material? No (0) Restrictions on the use of sulfur itself are not discussed. However, reasons for recovering sulfur from, for example, sulfur dioxide are presented.

SELF-REVIEW QUESTIONS Is the relationship, if any, between the property and processing explained? Yes (2) The second sentence reads, “…these properties are crucial to the Frasch process for mining sulfur (Section 5), in which superheated steam is used to melt subterranean sulfur, which is then forced to the surface with compressed air.”

SELF-REVIEW QUESTIONS Is the property related to environmental/health issues? Yes (2) The major theme of the essay addresses the environmental concerns regarding sulfur dioxide.

EXAMPLE OF AN INTERMEDIATE CONSTRAINT QUESTION Four-part question: two parts true or false, two parts multiple-choice. Four-part question: two parts true or false, two parts multiple-choice.

Q1–4. For the following sentences, mark as either true or false, or complete the text by inserting the most appropriate words from the attached lists. Strontium is in (1) Group II. Bromine is in (2) Group VII. Strontium bromide (SrB 2 ) is a(n) (3)______ solid and a (4)______. Strontium is in (1) Group II. Bromine is in (2) Group VII. Strontium bromide (SrB 2 ) is a(n) (3)______ solid and a (4)______. 1. True False True, strontium is in Group II.

Q1–4. For the following sentences, mark as either true or false, or complete the text by inserting the most appropriate words from the attached lists. Strontium is in (1) Group II. Bromine is in (2) Group VII. Strontium bromide (SrB 2 ) is a(n) (3)______ solid and a (4)______. Strontium is in (1) Group II. Bromine is in (2) Group VII. Strontium bromide (SrB 2 ) is a(n) (3)______ solid and a (4)______. 2. True False True, bromine is in Group II.

Q1–4. For the following sentences, mark as either true or false, or complete the text by inserting the most appropriate words from the attached lists. Strontium is in (1) Group II. Bromine is in (2) Group VII. Strontium bromide (SrB 2 ) is a(n) (3)______ solid and a (4)______. Strontium is in (1) Group II. Bromine is in (2) Group VII. Strontium bromide (SrB 2 ) is a(n) (3)______ solid and a (4)______. 3. atomic molecular hydrogen-bonded covalent network ionic metallic macromolecular Strontium is a metal (Group II), while bromine is a non-metal (Group VII). Hence, Sr will bond ionically to Br to create an ionic solid.

Q1–4. For the following sentences, mark as either true or false, or complete the text by inserting the most appropriate words from the attached lists. Strontium is in (1) Group II. Bromine is in (2) Group VII. Strontium bromide (SrB 2 ) is a(n) (3)______ solid and a (4)______. Strontium is in (1) Group II. Bromine is in (2) Group VII. Strontium bromide (SrB 2 ) is a(n) (3)______ solid and a (4)______. 4. metal ceramic polymer noble gas Strontium bromide is non-metallic (it is a compound of a metal and a non-metal) and inorganic (it is not carbonaceous). Hence, it is a ceramic.

Q1–4. For the following sentences, mark as either true or false, or complete the text by inserting the most appropriate words from the attached lists. Strontium is in Group II. Bromine is in Group VII. Strontium bromide (SrB 2 ) is an ionic solid and a ceramic. Strontium is in Group II. Bromine is in Group VII. Strontium bromide (SrB 2 ) is an ionic solid and a ceramic. 1. a 2. b 3. e 4. b