by horse Comment Closed

LARN 059 C15D3

Study for the summative assessment on chapter 7 that is to be given on your next school day that our class meets.  Today is day 59.  Study for your test which is scheduled for school day 60!  If your class does not meet on day 60, today’s home learning activities are listed under day 60 and on day 60 your home learning activities are those listed below.

ATTENTION:  If you have not already done so, locate three (3) shiny United States pennies that were minted after 1982, the shinier the better, to experiment with. Bring these pennies in to transform two of them into souvenir alloys celebrating your taking chemistry this year!  The pennies will be treated to form souvenirs of chemistry class. If the pennies you bring in are dull, you will have the clean them. Store them temporarily in your grommeted, three hole zipper pen case until it is time to do the laboratory activity.

Start the following in class:

1.  Go to http://www.phschool.com/webcodes10/index.cfm?wcprefix=cda&wcsuffix=1070&area=view  and take an online formative assessment for chapter 7, Ionic and Metallic Bonding.  Then click on the Score My Test button and study anything that you do not yet understand.

2.  Compare how the properties of ionic compounds and metallic substances differ on the sixteen properties worksheet entitled “Property to be understood”.  In your Learning Log express yourself in full sentences as you explain how

  • metals exhibit:
    •  high electrical and thermal conductivity,
    • malleability, ductility, and flexibility
  • whereas ionic solids exhibit:
    • resistance to the flow of electricity and thermal energy 
    • and are rather rigid and inflexible
    • and prone to easily being cleaved.

3. Study for your chapter 7 summative assessment on ionic and metallic bonding.

  1.  Know the distinctions between pairs of chapter 7 vocabulary words that might be confused with each other.
  2. Write the electron configuration for single monatomic cations and single monatomic anions and be able to draw electron dot structures for cations and anions.
  3. State and apply the rule of reacting to produce a completed outer, valence shell of electrons (duets or octets).
  4. Describe how atoms of low electronegativity and atoms of high electronegativity can react to form positive and negative ions that aggregate into ionic solids at room temperature.
  5. Describe how a model of omnidirectional electrostatic attractions of positive and negative ions can be used to explain the properties of ionic compounds.
  6. Describe how the model of a cloud of mobile, delocalized electrons that surround and move among the positively charged kernels of the metallic atoms (called metal ions in our text) can be used to explain the properties of metals (thermal and electrical conductivity, flexibility, malleability, ductility, sectility).
  7. Explain what alloys are and describe examples of important alloys.
  8. Identify simple cubic, coordination number (CN) = 6; body centered cubic, CN = 8; hexagonal closest packed, CN = 12, face centered cubic closest packed, CN = 12, atomic packing structures.
  9. Write the outer electronic configuration both for single atoms and for monatomic ions of elements in groups 1, 2, 13, 14, 15, 16, 17, or 18.
  10. Apply the rule for determining the total number of valence electrons for given neutral or charged atoms using the periodic table.
  11. Write correct formulas for ionically bonded compounds.
  12. Correctly use the Stock system of naming binary and ternary ionic compounds.

4. Review and study your notes, and your journal reflections. Study the Cornell notes that you took in and out of class.  Review anything that you previously corrected on the Chapter 7 Study Guides, Chapter 7 Section Reviews, Chapter 7 Ionic and Metallic Bonding[Formative]Test A, and other work sheets which you now have checked using green ink. Look up anything that you still don’t understand in your text, glossary, vocabulary study sheets, class notes, or come to help class if you need help.

Recommended for those who have time left in their 45 minute study period, but not required of all:

1.  Click on this link and record Cornell notes describing the different ways ionic and covalent bonds form and how their typical properties differ.

2. Review the meanings of the words on the chapter 1, chapter 2, chapter 3,chapter 4, chapter 5, chapter 6, and chapter 7 vocabulary lists. Place a – symbol in front of each word that you have to study more, and a change the – to a + symbol in front when you have demonstrated mastery over the word to a study buddy, parent, or friend.

3. Check out the student made Quizlet for chapter 7 at https://quizlet.com/171092936/ch-7-
ionic-metallic- bonding-flash- cards/.  Do all the definitions reflect a thorough and correct understanding?

4.   Study the Key Concepts given on pages 33, 57, 95, 121, 148, 180, and 206 of the text.

5.  Study the SI prefixes and their mathematical meanings until you can readily explain the meaning of each listed SI prefix as a numerical multiplier.

Enrichment:

How can one do the mathematical analysis of the packing efficiencies of the simple cubic (52.4%), body centered cubic (68.0%), and face centered cubic and hexagonal closest packed structures (74.0%)?