
(a)
Interpretation:
The nuclear charge of the element needs to be calculated.
Concept Introduction:
The nuclear charge is equal to the number of protons.
The mass number is the sum of protons and neutrons. And hence,
(a)

Answer to Problem 70A
The nuclear charge of the element is
Explanation of Solution
Here,
•
•
(b)
Interpretation:
The symbol and name of the element need to be determined.
Concept Introduction:
The
(b)

Answer to Problem 70A
The
Explanation of Solution
Hence, the atomic number of the element is also
The atomic number
(c)
Interpretation:
The number of valence electrons is to be determined.
Concept Introduction:
For the neutral atom,
From electronic configuration, valence electrons can be determined.
(c)

Explanation of Solution
The electronic configuration of Hg is
Valence electrons are outer electrons of the shell. So, for Hg, valence electrons are two.
(d)
Interpretation:
The energy level is to be determined.
Concept Introduction:
The number of energy levels is the possible levels around the nucleus where electrons are present. It depends on the period number of an element. For example, elements in the 1st period have 1 energy level, elements in the 2nd period have 2 energy levels and so on.
(d)

Answer to Problem 70A
The number of energy levels is 5.
Explanation of Solution
The number of electrons in a neutral atom is 40 thus, the electronic configuration will be:
Since the outermost electron is present in the 5th shell, thus; the number of energy levels will be 5.
Chapter 11 Solutions
World of Chemistry
- For each scenario below, select the color of the solution using the indicator thymol blue during the titration. When you first add indicator to your Na2CO3solution, the solution is basic (pH ~10), and the color is ["", "", "", "", ""] . At the equivalence point for the titration, the moles of added HCl are equal to the moles of Na2CO3. One drop (or less!) past this is called the endpoint. The added HCl begins to titrate the thymol blue indicator itself. At the endpoint, the indicator color is ["", "", "", "", ""] . When you weren't paying attention and added too much HCl (~12 mL extra), the color is ["", "", "", "", ""] . When you really weren't paying attention and reached the second equivalence point of Na2CO3, the color isarrow_forwardThe following reaction is run in which the initial conditions include only methane (CH4) at a concentration of0.115 M. Once equilibrium was established, the concentration of acetylene (C2H2) was measured to be 0.035M. What is the value of the equilibrium constant, K?2 CH4 (g) ⇋ C2H2 (g) + 3 H2 (g)arrow_forwardCalculate the equilibrium concentration of carbon dioxide for the following reaction:2 COF2 (g) ⇋ CF4 (g) + CO2 (g) Kc = 2.00 at 10.00 °C. at equilibrium [COF2] = 0.255M; [CF4] = 0.118Marrow_forward
- In a benzene derivative that has -CH2CH3, indicate how it can be substituted by -COOH.arrow_forwardIn a sulfonated derivative of benzene, indicate how -SO3H can be eliminated.arrow_forwardWhat is the equilibrium expression (law of mass action) for the following reaction:CO2 (g) + H2O (l) ⇋ H+ (aq) + HCO3- (aq)arrow_forward
- Indicate the compound resulting from adding NaOH cyclopentane-CH2-CHO.arrow_forwardUse the provided information to calculate Kc for the following reaction at 550 °C: H2(g) + CO2(g) ⇌ CO(g) + H2O(g) Kc = ?CoO(s) + CO(g) ⇌ Co(s) + CO2(g) Kc1 = 490CoO(s) + H2(g) ⇌ Co(s) + H2O(g) Kc2 = 67arrow_forwardCalculate Kc for the reaction: I2 (g) ⇋ 2 I (g) Kp = 6.26 x 10-22 at 298Karrow_forward
- For each scenario below, select the color of the solution using the indicator thymol blue during the titration. When you first add indicator to your Na2CO3solution, the solution is basic (pH ~10), and the color is ["", "", "", "", ""] . At the equivalence point for the titration, the moles of added HCl are equal to the moles of Na2CO3. One drop (or less!) past this is called the endpoint. The added HCl begins to titrate the thymol blue indicator itself. At the endpoint, the indicator color is ["", "", "", "", ""] . When you weren't paying attention and added too much HCl (~12 mL extra), the color is ["", "", "", "", ""] . When you really weren't paying attention and reached the second equivalence point of Na2CO3, the color isarrow_forwardTo convert cyclopentane-CH2-CHO to cyclopentane-CH2-CH3, compound A is added, followed by (CH3)3CO-K+, DMS at 100oC. Indicate which compound A is.arrow_forwardIndicate how to obtain the compound 2-Hydroxy-2-phenylacetonitrile from phenylmethanol.arrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY





