Concept explainers
(a)
Interpretation:
The Lewis symbols for the lithium atom has to be determined.
Concept Introduction:
Lewis electron-dot symbols can be used to predict the number of bonds formed by most elements in their compounds. Lewis electron-dot symbol consists of the chemical symbol for an element surrounded by dots that represent its valence electrons.
Some features of the Lewis electron-dot symbol are as follows:
1. It is the representation of valence electrons.
2. It allows to keep track of valence electrons during bond formation.
3. It consists of the chemical symbol for the element and a dot for each valence electron.
(b)
Interpretation:
The Lewis symbol for
Concept Introduction:
Refer to part (a).
(c)
Interpretation:
The Lewis symbol for
Concept Introduction:
Refer to part (a).
(d)
Interpretation:
The Lewis symbol for bromine atom has to be determined.
Concept Introduction:
Refer to part (a).
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Chemistry: Principles and Practice
- Reagan is doing an atomic absorption experiment that requires a set of zinc standards in the 0.4- 1.6 ppm range. A 1000 ppm Zn solution was prepared by dissolving the necessary amount of solid Zn(NO3)2 in water. The standards can be prepared by diluting the 1000 ppm Zn solution. Table 1 shows one possible set of serial dilutions (stepwise dilution of a solution) that Reagan could perform to make the necessary standards. Solution A was prepared by diluting 5.00 ml of the 1000 ppm Zn standard to 50.00 ml. Solutions C-E are called "calibration standards" because they will be used to calibrate the atomic absorption spectrometer. Table 1: Dilutions of Zinc Solutions Solution Zinc Solution Volume Diluted Solution Concentration used volume (ppm Zn) (mL) (mL) concentration (ppm Zn) Solution concentration A 1000 5.00 50.00 1.00×10² (ppm Zn(NO3)2) 2.90×10² Solution concentration (M Zn(NO3)2 1.53×10-3 B Solution A 5.00 100.00 5.00 C Solution B 5.00 50.00 0.50 7.65×10-6 D Solution B 10.00 50.00…arrow_forwardNonearrow_forwardNonearrow_forward
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- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning