Ch.19 - Nuclear ChemistryWorksheetSee all chapters
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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: The radioactive isotope 19O, prepared by neutron irradiation of  19F, has a half life of 29 s. What percentage of a freshly prepared sample of 19O remains after 2.00 min? (a) 4.5% (b) 25% (c) 5.7%

Problem

The radioactive isotope 19O, prepared by neutron irradiation of  19F, has a half life of 29 s. What percentage of a freshly prepared sample of 19O remains after 2.00 min?

(a) 4.5%

(b) 25%

(c) 5.7%

(d) 18%

(e) 69%