This interactive, scaffolded activity allows students to build an atom within the framework of a newer orbital model. It opens with an explanation of why the Bohr model is incorrect and provides an analogy for understanding orbitals that is simple enough for grades 8-9. As the activity progresses, students build atoms and ions by adding or removing protons, electrons, and neutrons. As changes are made, the model displays the atomic number, net charge, and isotope symbol. Try the "Add an Electron" page to build electrons around a boron nucleus and see how electrons align from lower-to-higher energy.
See Related Materials for a Teacher's Guide that supplements this particular resource. It includes an activity answer key and homework questions for students.
This item is part of the Concord Consortium, a nonprofit research and development organization dedicated to transforming education through technology. The Concord Consortium develops deeply digital learning innovations for science, mathematics, and engineering. The models are all freely accessible. Users may register for additional free access to capture data and store student work products.
Please note that this resource requires
Editor's Note:Why we like it: This resource offers a set of tools to let students go beyond the passive tutorial to create their own atomic models. They can play with mass and charge, create different isotopes, investigate what gives an atom charge, and build models that identify patterns. It's fun, interactive, and flexible enough for use in classroom groups or home study.
Atomic Structure: NextGen Standards In order to access this file, please Login to the Physics Front collection.
View alignments for this resource to NGSS standards in an easy-to-read table format. Includes Core Ideas, Performance Expectations, and Science Practices.
.pdf file (334 kb Adobe PDF Document)
Published: February 22, 2013
Science of Atoms and Molecules, atom builder, atom simulations, atomic simulations, atomic structure, atomic/molecular, build an atom, ions, isotopes, orbital model, orbitals, periodic table
Metadata instance created
May 6, 2011
by Caroline Hall
February 22, 2013
by Caroline Hall
Last Update when Cataloged:
November 25, 2008
AAAS Benchmark Alignments (2008 Version)
4. The Physical Setting
4D. The Structure of Matter
6-8: 4D/M1a. All matter is made up of atoms, which are far too small to see directly through a microscope.
9-12: 4D/H1. Atoms are made of a positively charged nucleus surrounded by negatively charged electrons. The nucleus is a tiny fraction of the volume of an atom but makes up almost all of its mass. The nucleus is composed of protons and neutrons which have roughly the same mass but differ in that protons are positively charged while neutrons have no electric charge.
9-12: 4D/H2. The number of protons in the nucleus determines what an atom's electron configuration can be and so defines the element. An atom's electron configuration, particularly the outermost electrons, determines how the atom can interact with other atoms. Atoms form bonds to other atoms by transferring or sharing electrons.
9-12: 4D/H3. Although neutrons have little effect on how an atom interacts with other atoms, the number of neutrons does affect the mass and stability of the nucleus. Isotopes of the same element have the same number of protons (and therefore of electrons) but differ in the number of neutrons.
9-12: 4D/H4. The nucleus of radioactive isotopes is unstable and spontaneously decays, emitting particles and/or wavelike radiation. It cannot be predicted exactly when, if ever, an unstable nucleus will decay, but a large group of identical nuclei decay at a predictable rate. This predictability of decay rate allows radioactivity to be used for estimating the age of materials that contain radioactive substances.
10. Historical Perspectives
10F. Understanding Fire
9-12: 10F/H5. Since Lavoisier and Dalton, the system for describing chemical reactions has been vastly extended to account for the configuration taken by atoms when they bond to one another and to describe the inner workings of atoms that account for why they bond as they do.
11. Common Themes
6-8: 11B/M1. Models are often used to think about processes that happen too slowly, too quickly, or on too small a scale to observe directly. They are also used for processes that are too vast, too complex, or too dangerous to study.
6-8: 11D/M3. Natural phenomena often involve sizes, durations, and speeds that are extremely small or extremely large. These phenomena may be difficult to appreciate because they involve magnitudes far outside human experience.
This resource is part of 2 Physics Front Topical Units.
Topic: Particles and Interactions and the Standard Model Unit Title: Matter and Interactions
A scaffolded activity for students to explore atom-building within the framework of a newer orbital model. It opens with an explanation of why the Bohr model is incorrect and provides an analogy for understanding orbitals that is simple enough for grades 8-9. As the activity progresses, students build atoms and ions by adding or removing protons, electrons, and neutrons. Don't miss the "Add An Electron" page to see how electrons align from lower-to-higher energy.
Topic: Particles and Interactions and the Standard Model Unit Title: The Standard Model
A scaffolded activity for students to explore atom-building within the framework of the Standard Model. It opens with an explanation of why the Bohr model is incorrect and provides an analogy for understanding orbitals that is simple enough for grades 8-9. As the activity progresses, students build atoms and ions by adding or removing protons, electrons, and neutrons. Don't miss the "Add An Electron" page to see how electrons align from lower-to-higher energy.
%0 Electronic Source %D November 25, 2008 %T Concord Consortium: Atomic Structure %I The Concord Consortium %V 2013 %N 23 May 2013 %8 November 25, 2008 %9 application/java %U http://concord.org/activities/atomic-structure
Disclaimer: ComPADRE offers citation styles as a guide only. We cannot offer interpretations about citations as this is an automated procedure. Please refer to the style manuals in the Citation Source Information area for clarifications.
A Teacher's Guide developed specifically to accompany the Molecular Logic "Atomic Structures" activity. It includes background information, student homework questions, and an answer key to problems posed in the online resource.