Concept explainers
(a)
Interpretation:
Among the given atoms, the isobars and isotopes should be identified.
Ca-40, Ca-41, K-41, and Ar-41
Concept introduction:
An atom which has different
An atom which contain same number of protons (atomic number) but the number of neutrons is different is known as isotopes.
In nuclide notation of isotope, the mass number of the isotope is present in superscript in front of the
The expression is given by:
Where, A = mass number and Z = atomic number
In hyphenated form of isotope, the name of chemical element is written before the mass number.
(b)
Interpretation:
The common between Ca-40 and Ca-41 should be identified.
Concept introduction:
An atom which has different atomic number (number of protons) but same mass number is known as isobars.
An atom which contain same number of protons (atomic number) but the number of neutrons is different is known as isotopes.
In nuclide notation of isotope, the mass number of the isotope is present in superscript in front of the symbol of given element and atomic number is present in subscript in front of the symbol of the element.
The expression is given by:
Where, A = mass number and Z = atomic number
In hyphenated form of isotope, the name of chemical element is written before the mass number.
(c)
Interpretation:
The given statement should be correct if it is incorrect.
Atoms of Ca-41, K-41 and Ar-41 have the same number of neutrons.
Concept introduction:
An atom which has different atomic number (number of protons) but same mass number is known as isobars.
An atom which contain same number of protons (atomic number) but the number of neutrons is different is known as isotopes.
In nuclide notation of isotope, the mass number of the isotope is present in superscript in front of the symbol of given element and atomic number is present in subscript in front of the symbol of the element.
The expression is given by:
Where, A = mass number and Z = atomic number
In hyphenated form of isotope, the name of chemical element is written before the mass number.
Trending nowThis is a popular solution!
Chapter 2 Solutions
Chemistry: Principles and Reactions
- 2-73 (Chemical Connections 2D) Copper is a soft metal. how can it be made harder?arrow_forward2-99 A 7.12 g sample of magnesium is heated with 1.80 g of bromine. All the bromine is used up, and 2.07 g of magnesium bromide is produced. What mass of magnesium remains unreacted?arrow_forward(a) How many elements are found in period 4 in the periodic table? (b) How many elements are found in group 4A (or 14)?arrow_forward
- The natural abundance of 3He is 0.000137%. (a) How manyprotons, neutrons, and electrons are in an atom of 3He?(b) Based on the sum of the masses of their subatomic particles,which is expected to be more massive, an atom of 3He oran atom of 3H (which is also called tritium)? (c) Based on youranswer to part (b), what would need to be the precision of amass spectrometer that is able to differentiate between peaksthat are due to 3He+ and 3H+?arrow_forwardWrite the nuclide notation, including charge if applicable, for atoms with the following characteristics:(a) 25 protons, 20 neutrons, 24 electrons(b) 45 protons, 24 neutrons, 43 electrons(c) 53 protons, 89 neutrons, 54 electrons(d) 97 protons, 146 neutrons, 97 electronsarrow_forwardConsider the following equation: The mass number of element X is: 213A + 23B - 87C+ (x]x + 3narrow_forward
- An isotope with atomic number 64 and mass number 158 is found to have a mass ratio relative to that of carbon-12 of 13.16034. What is the isotope, what is its atomic mass in u, and what is its mass relative to oxygen-16?arrow_forwardElement Atomic Number: 1 Name: Hydrogen Symbol: H Atomic Number 1 O'H O2H 25 50 75 Atomic Number An atom can be thought of as being formed from a number of combined 'H atoms with additional neutrons in the nucleus. The mass of an atom is less than that of the combined masses of the nuclear particles from which it is formed. This "mass loss" is an indication of the stablity of the atom's nucleus. In order to compare different atoms, the relative mass loss (in g/mol) is defined as: [(number protons x mass of 'H)+(number of neutrons x mass of n)] - atomic mass number of protons + number of neutrons The atom's binding energy (the energy associated with holding the nucleus together) can be calculated as: relative mass loss (kg/mol) x (2.998 x 10°m/s) The resulting units are joules/mole. Because calculating the relative mass loss involves dividing by the total number of nucleons (protons + neutrons), the binding energy is called the 'binding energy per nucleon.' (Previous Next) Relative…arrow_forwardCan i get some help with this problem?arrow_forward
- Helium is the lightest noble gas and the second most abundant element (after hydrogen) in the universe. (a) The radius of a helium atom is 3.1x10-11 m; the radius of its nucleus is 2.5x10-15 m. What fraction of the spherical atomic volume is occupied by the nucleus (V of a sphere 5 4/ 3πr3)? (b) The mass of a helium-4 atom is 6.64648x10-24 g, and each of its two electrons has a mass of 9.10939x10-28 g. What fraction of this atom’s mass is contributed by its nucleus?arrow_forwardNuclei differ in their stability, and some are so unstable thatthey undergo radioactive decay. The ratio of the number of neutrons to number of protons (N/Z) in a nucleus correlateswith its stability. Calculate the N/Zratio for (a) ¹⁴⁴Sm; (b) ⁵⁶Fe;(c) ²⁰Ne; (d) ¹⁰⁷Ag. (e) The radioactive isotope ²³⁸U decays ina series of nuclear reactions that includes another uranium isotope,²³⁴U, and three lead isotopes, ²¹⁴Pb, ²¹⁰Pb, and ²⁰⁶Pb. How manyneutrons, protons, and electrons are in each of these five isotopes?arrow_forwardPlease don't provide handwriting solutionarrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningIntroduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
- Living By Chemistry: First Edition TextbookChemistryISBN:9781559539418Author:Angelica StacyPublisher:MAC HIGHERChemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning