Isotopes and Atomic Mass

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  • Isotopes
  • Atomic Mass
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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.
Version 3.02

Teacher Tips

Download teacher tips PDF Overview of sim controls, model simplifications, and insights into student thinking ( PDF ).

Teacher-Submitted Activities

Isotopes & Atomic Mass-Inquiry Activity A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Trish Loeblein UG-Intro
HS
Demo
HW
Remote
Lab
Earth Science
Chemistry
Concept questions for Physics using PhET (Inquiry Based) A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Trish Loeblein UG-Intro
HS
MC Physics
Using PhET in High School Chemistry- all my activities in pdf A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Trish Loeblein HS
UG-Intro
Lab
Demo
HW
Chemistry
Concept Questions for Chemistry using PhET A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Trish Loeblein HS
UG-Intro
MS
MC Chemistry
Isotopes and Atomic Mass - Clicker Questions A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Yuen-ying Carpenter, Robert Parson, Trish Loeblein UG-Intro MC Chemistry
Isotopes and Atomic Mass - Guided Inquiry Activity A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Timothy Herzog UG-Intro Guided Chemistry
Exploring Average Atomic Mass A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. Stephanie Davis HS Lab Chemistry
How do PhET simulations fit in my middle school program? This contribution was designed by PhET. Sarah Borenstein MS Other Chemistry
Earth Science
Physics
Biology
PhET Sims Aligned to the Chemistry Curriculum This contribution was designed by PhET. Julia Chamberlain HS
UG-Intro
Other Chemistry
Mapping of PhET and IBDP Physics Jaya Ramchandani HS Other Physics
MS and HS TEK to Sim Alignment Elyse Zimmer HS
MS
Other Physics
Chemistry
Biology
Isotopes Corrin Funnell HS Guided Physics
Chemistry
Modeling Relative Atomic Mass Roberto Marrero UG-Intro
HS
HW
Lab
Chemistry
Modeling Isotopes Roberto Marrero HS
MS
HW
Lab
동위원소와 원자량 SIM 사용지침서 이화국(Wha Kuk Lee) MS
HS
Demo
Other
Chemistry
Physics
Isótopos y masa atómica Amaya Garcia-Barahona HS HW
Lab
Guided
Chemistry

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Arabic All العربية Run now النظائر وعدد الكتلة
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Bosnian All Bosanski Run now IZOTOPI I ATOMSKE MASE
Bulgarian All български Run now Изотопи и атомна маса
Chinese (Simplified) All 中文 (中国) Run now 同位素原子质量数
Chinese (Traditional) All 中文 (台灣) Run now 同位素與原子量
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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