
Concept explainers
(a)
Interpretation:
The number of protons and neutrons that are present in the given nucleus of noble gases has to be determined.
(a)

Answer to Problem 2.89QP
The total number of protons and neutrons present is:
Explanation of Solution
Element symbol is given as
Element symbol given is
From the given symbol, it is found that the mass number is 4 and atomic number is 2. This means the total number of protons present is 2. Number of neutrons present in the nucleus can be calculated by finding the difference between mass number and atomic number.
In the helium atom, the atomic number 2 is equal to protons number and the differences between the mass number and proton number gives the neutron number 2.
Element symbol given is
From the given symbol, it is found that the mass number is 20 and atomic number is 10. This means the total number of protons present is 10. Number of neutrons present in the nucleus can be calculated by finding the difference between mass number and atomic number.
In the neon atom, the atomic number 10 is equal to protons number and the differences between the mass number and proton number gives the number of neutrons as 10.
Element symbol given is
From the given symbol, it is found that the mass number is 40 and atomic number is 18. This means the total number of protons present is 18. Number of neutrons present in the nucleus can be calculated by finding the difference between mass number and atomic number.
In the argon atom, the atomic number 18 is equal to protons number and the differences between the mass number and proton number gives the number of neutrons as 22.
Element symbol given is
From the given symbol, it is found that the mass number is 84 and atomic number is 36. This means the total number of protons present is 36. Number of neutrons present in the nucleus can be calculated by finding the difference between mass number and atomic number.
In the krypton atom, the atomic number 36 is equal to protons number and the differences between the mass number and proton number gives the number of neutrons as 48.
Element symbol given is
From the given symbol, it is found that the mass number is 132 and atomic number is 54. This means the total number of protons present is 54. Number of neutrons present in the nucleus can be calculated by finding the difference between mass number and atomic number.
In the xenon atom, the atomic number 54 is equal to protons number and the differences between the mass number and proton number gives the number of neutrons as 78.
Number of protons and neutrons present in the given noble gases are determined.
(b)
Interpretation:
The ratio of neutrons to protons along with their respective numbers in the nucleus of each atom to be identified.
(b)

Answer to Problem 2.89QP
Neutron to proton ratio for noble gases is:
As the atomic number increases, the neutron to proton ratio also increases.
Explanation of Solution
Analyze the ratio of neutrons to protons for each element.
The ratio of neutron to proton is increasing down the group along with increasing the atomic number.
Want to see more full solutions like this?
Chapter 2 Solutions
Chemistry
- In the decomposition reaction in solution B → C, only species C absorbs UV radiation, but neither B nor the solvent absorbs. If we call At the absorbance measured at any time, A0 the absorbance at the beginning of the reaction, and A∞ the absorbance at the end of the reaction, which of the expressions is valid? We assume that Beer's law is fulfilled.arrow_forward> You are trying to decide if there is a single reagent you can add that will make the following synthesis possible without any other major side products: 1. ☑ CI 2. H3O+ O Draw the missing reagent X you think will make this synthesis work in the drawing area below. If there is no reagent that will make your desired product in good yield or without complications, just check the box under the drawing area and leave it blank. Click and drag to start drawing a structure. Explanation Check ? DO 18 Ar B © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibilityarrow_forwardDon't use ai to answer I will report you answerarrow_forward
- Consider a solution of 0.00304 moles of 4-nitrobenzoic acid (pKa = 3.442) dissolved in 25 mL water and titrated with 0.0991 M NaOH. Calculate the pH at the equivalence pointarrow_forwardWhat is the name of the following compound? SiMe3arrow_forwardK Draw the starting structure that would lead to the major product shown under the provided conditions. Drawing 1. NaNH2 2. PhCH2Br 4 57°F Sunny Q Searcharrow_forward
- 7 Draw the starting alkyl bromide that would produce this alkyne under these conditions. F Drawing 1. NaNH2, A 2. H3O+ £ 4 Temps to rise Tomorrow Q Search H2arrow_forward7 Comment on the general features of the predicted (extremely simplified) ¹H- NMR spectrum of lycopene that is provided below. 00 6 57 PPM 3 2 1 0arrow_forwardIndicate the compound formula: dimethyl iodide (propyl) sulfonium.arrow_forward
- General Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
- Chemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning





