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CHEM 141 FINAL EXAM QUESTIONS WITH CORRECT ANSWERS

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CHEM 141 FINAL EXAM QUESTIONS WITH CORRECT ANSWERS

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Group 8A—Noble Gases


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• Noble gases are all nonmetals that are gases at room temperature.
• They are all monoatomic.
- This means that they consist of single atoms rather than molecules.

,amplitude


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The height of the wave maximum from the center




Oxidation-reduction or redox reactions


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Electrons are transferred from one reactant to another




Amorphous solids


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characterized by a distinct lack of order in the arrangement of atoms.
- Do not have well defined faces/shapes




Precision


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is a measure of how closely individual measurements agree with one
another.

,Bond Order


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The stability of a covalent bond
𝐁𝐨𝐧𝐝𝐨𝐫𝐝𝐞𝐫= 𝟏/𝟐 (#𝐨𝐟𝐛𝐨𝐧𝐝𝐢𝐧𝐠𝐞𝐥𝐞𝐜𝐭𝐫𝐨𝐧𝐬 −#𝐨𝐟𝐚𝐧𝐭𝐢𝐛𝐨𝐧𝐝𝐢𝐧𝐠𝐞𝐥𝐞𝐜𝐭𝐫𝐨𝐧𝐬)




Sigma bonds


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characterized by- head-to-head overlap.
- cylindrical symmetry of electron density about the internuclear axis.




Compounds


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That means that the relative number of atoms of each element in the
compound is the same in any sample.




Organic chemistry


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, the study of carbon.




Effective nuclear charge


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the net positive charge from the nucleus that an electron can "feel"
attractions from.




Precipitation reactions


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Cations and anions →insoluble ionic compounds




Negligible molecular volume


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The combined volume of all the molecules of the gas is negligible relative
to the total volume in which the gas is contained.




Physical changes


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