Electrons Table
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Chapter 8
1- What is a likely source of error in identifying a compound using thin layer chromatography? Choose from: not accurately measuring the volume, the time, mass, distance or density
2- What property is used to separate solutes using thin layer chromatography?
3- Consider the following image, in which the 'x' designates where the solute was spotted. What is the Rf value of the solute? Choose from: 0.36, 0.75, 0.70,0.67, 1.20
4- Which of the following atoms would be expected to have the largest radius? Choose from : B, Ne,C,,O Li
5- Which of the following atoms will have no unpaired electrons? Choose from : Br, Be, Si, Na, Al
6- What is the complete ground state electron configuration for oxygen (O)?
7- Which of the following elements would you expect to have the lowest first ionization energy? Choose from: He,Ar,Na,Xe,Ne
8- Write a Lewis structure for each molecule or ion. Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons.
N 2 H 2
N 2 H 4
CN -
NO 2 −
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Solution Summary
The expert examines electron tables. The atoms what there still are unpaired electrons. The ground state electron configurations for oxygen are given.
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Chapter 8
1- What is a likely source of error in identifying a compound using thin layer chromatography? Choose from: not accurately measuring the volume, the time, mass, distance or density
TLC is used to identify compounds based on the distance traveled. Hence not accurately measuring distance is a likely source of error.
2- What property is used to separate solutes using thin layer chromatography?
The polarity of solutes is used to ...
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