About

Topics

• Isotopes
• Atomic Mass

Description

Are all atoms of an element the same? How can you tell one isotope from another? Use the sim to learn about isotopes and how abundance relates to the average atomic mass of an element.

Sample Learning Goals

• Define “isotope” using mass number, atomic number, number of protons, neutrons and electrons.
• Given information about an element, find the mass and name of an isotope.
• Give evidence to support or dispute: “In nature, the chance of finding one isotope of an element is the same for all isotopes.”
• Find the average atomic mass of an element given the abundance and mass of its isotopes.
• Predict how the mass and name of an isotope will change given a change in the number of protons, neutrons or electrons.
• Predict how the average atomic mass of an element changes given a change in the abundance of its isotopes.

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For Teachers

[SIMU_TEACHER]

Software Requirements

Windows	Macintosh	Linux
Microsoft Windows XP/Vista/7 Sun Java 1.5.0_15 or later	OS 10.5 or later Sun Java 1.5.0_19 or later	Sun Java 1.5.0_15 or later

Credits

Design Team	Third-party Libraries	Thanks To
Kelly Lancaster (lead) John Blanco (lead developer) Sam Reid (developer) Trish Loeblein Emily Moore Robert Parson Kathy Perkins	Piccolo2D	Jack Barbara Suzanne Brahmia Sue Doubler Loretta Jones

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