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Unit 4: Atomic and Molecular Models Notebook Labs

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The following items should be in the Unit 4 portion of your notebook.  They should be clearly organized and easy to find.  Use an organizational system and label all work. Each lab will be graded separately.  All lab grades will be entered into the gradebook. 





Lab AMM1 - Elemental Fingerprinting

Question:
Based on observation of their line spectra, what is the identify of the four unknown elements?

Purpose:
To carefully observe the line spectra of four unknown elements and to identify the four elements by comparing their line spectra to those of known elements.

Safety:
The gas discharge tubes can get very hot to the touch; do not handle or touch them. The holders of the gas discharge tube is capable of causing a lethal shock to those who touch the metal holders.  Please DO NOT TOUCH!

Disposal:
None

A complete lab write-up includes a Title, a Purpose section, a Data section, a Conclusion, and a Discussion of Results section.  The Data section should include the provided table, taped in and completed as the observations are made.  Notes should be included as the observed line spectra are compared to those of known elements. The Conclusion should answer the question raised in the purpose. The Discussion of Results should discuss the logic which led to the stated conclusion. The logic should be thorough and detailed, demonstrating the correlation between the collected line spectra and those of the known elements.








Lab AMM2 - It's Periodic


Question:
What is the pattern by which the atomic radius, ionization energy and electronegativity changes from element to element across a period and down a group of the periodic table?

Purpose:
To use plots of atomic radius, ionization energy and electronegativity versus atomic number in an effort to recognize patterns in how these properties change from element to element across a period and down a group of the periodic table.

Safety:
None

Disposal:
None

A complete lab write-up includes a Title, a Purpose section, a Data section, and a Conclusion/Discussion section.  The Data section should include the provided data (taped in) and computer generated plots (taped in) of the data (property versus atomic number).  The Conclusion/Discussion should describe the periodic trends which describe how the three properties generally change (increase or decrease) from element to element across a period and down a column of the periodic table.










Lab AMM3 - Ionic vs. Covalent

Question:
How does the relative strength of ionic bonds compare to the strength of covalent bonds?

Purpose:
To compare the relative strengths of ionic and covelent bonds.

Safety:
Hair and bunsen burner flames don't mix. Clothing doesn't do much better. Heated aluminum foil should be immediately extinguished and cooled in the beaker of water.

Disposal:
Dispose of aluminum foil in the garbage can. All other soids are soluble and can be poured down the drain.

A complete lab write-up includes a Title, a Purpose section, a Data section, and a Conclusion/Discussion of Results section. The Data section should include organized and relevant observations of what occurs when the solids are placed in the bunsen burner flames; relevant information includes time-based information. The Conclusion should include a claim that answers the question implied by the purpose. In addition to the claim, evidence and reasoning to support the claim should be discussed. Evidence always references specific data observations; reasoning provides the logical tie between evidence and claim.










Lab AMM4 - Molecular Geometry and Polarity

Question:
What is the Lewis structure, AXiEj notation, molecular geometry and polarity for the variety of molecules?

Purpose:
To determine the molecular geometry and overall polarity of a collection of molecules.

Safety:
No issues.

Disposal:
No issues.

A complete lab write-up includes the completed Google Doc.












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