Unformatted text preview: 11/6/12 Lab 6 PreLab -‐‑ Solid State Modeling WebAssign Lab 6 PreLab - Solid State Modeling (Prelab)
Current Score : 25 / 25 Steve Yarush
CH102, section 021, Fall 2012
Instructor: Brandon Zoellner Due : Monday, October 8 2012 11:00 PM EDT The due date for this assignment is past. Your work can be viewed below, but no changes can be made. Important! Before you view the answer key, decide whether or not you plan to request an extension. Your
Instructor may not grant you an extension if you have viewed the answer key. Automatic extensions are not granted
if you have viewed the answer key.
Request Extension View Key 1. 5/5 points | Previous Answers NCSUGenChem102LabV1 6.PRE.01. Green checks and red X's are not displayed for this question.
Select all responses which correctly address safety issues in the Solid State Modeling lab. The usual rules about appropriate clothing and safety glasses must be observed.
The usual rules about safety glasses can be ignored because we won't be handling
The usual rules about appropriate clothing can be ignored because we won't be handling
Food and beverages are never permitted in labs. The wastes in the Solid State Modeling experiment should be disposed of in the following way. They should be disposed of in the labeled container.
There will be no waste material in this experiment. They should be sent to the cafeteria for recycling.
They should be thrown in the trash can.
They should be flushed down the sink with plenty of water. Solid State Modeling -‐‑Responses/last?dep=4413677 1/2 11/6/12 Lab 6 PreLab -‐‑ Solid State Modeling 2. 10/10 points | Previous Answers NCSUGenChem102LabV1 6.PRE.02. Green checks and red X's are not displayed for this question.
(a) When an ordered arrangement of particles extends over a long distance in a solid, the
material is considered crystalline. (b) The ordered arrangement of particles is called a lattice. (c) The unit cell is the smallest repeating three-dimensional array that includes the stoichiometry of the compound as given by its empirical or molecular formula. (d) An alternate name for the simple cubic unit cell is the primitive (e) In Part B, a model of fluorite, cell. a mineral form of calcium fluoride, will be assembled. Solid State Modeling 3. 10/10 points | Previous Answers NCSUGenChem102LabV1 6.PRE.03. Green checks and red X's are not displayed for this question.
In part B of the Solid State Modeling lab, models of ionic crystalline compounds will be assembled.
It will be useful to know the relationship between the size of an atom in its elemental form and
the size of its ion. Take a moment to think about what happens to the size of an atom when an
electron is removed to form a cation, or added to form an anion.
(a) Cations are smaller (b) Anions are larger than the elements from which they form. than the elements from which they form. Choose the correct response regarding unit cells in each statement.
(c) Body-centered cubic unit cells have identical particles on all corners, and in the center. (d) Face-centered cubic unit cells have identical particles on all corners, and on all faces of the cube. (e) Simple cubic unit cells have identical particles on all corners of the cube. Solid State Modeling -‐‑Responses/last?dep=4413677 2/2 ...
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- Fall '07
- Electron, Solid State Modeling