Ch.2 - Atoms & ElementsWorksheetSee 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: An element has four naturally occurring isotopes with the masses and natural abundances given here.IsotopeMass (amu)Abundance (%)1135.907140.19002137.905990.25003139.9054388.434141.9092411.13Find the

Solution: An element has four naturally occurring isotopes with the masses and natural abundances given here.IsotopeMass (amu)Abundance (%)1135.907140.19002137.905990.25003139.9054388.434141.9092411.13Find the

Problem

An element has four naturally occurring isotopes with the masses and natural abundances given here.


IsotopeMass (amu)Abundance (%)
1135.907140.1900
2137.905990.2500
3139.9054388.43
4141.9092411.13


Find the atomic mass of the element.


Solution
  • Atomic mass of an element can be calculated as summation of the mass of each isotope multiplied by their % abundance:

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