Ch.19 - Nuclear ChemistryWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Which of the following isotopes would you expect to be stable?a. uranium-238b. 4Hec. oxygen-16d. 208Poe. 58Ni

Solution: Which of the following isotopes would you expect to be stable?a. uranium-238b. 4Hec. oxygen-16d. 208Poe. 58Ni

Problem

Which of the following isotopes would you expect to be stable?

a. uranium-238

b. 4He

c. oxygen-16

d. 208Po

e. 58Ni

Solution

We can know the stability of an isotope depending on the ratio of neutrons to protons but these criteria changes depending on the number of protons it has. We have listed below the ranges for the number of protons (Z) and the corresponding ratio (N/Z, where N is the number of neutrons) where the isotope would be most stable. The actual ratio doesn't have to be exact. It just has to be near the ideal ratio.

Now we go through each choice. We are going to use the notation below to write the isotopes:

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