CK-12 Foundation
Marie Curie's Classroom
What makes some elements stable and others radioactive? Scholars adjust the number of protons and neutrons in an element then observe its decay. The simulation includes a graphical representation and the chemical formula, as well as...
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Radioactive Samples
Students examine the different types of radioactivity. In this radioactive samples lesson students complete a lab activity on radiation and complete a handout.
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Selected Elements
This collection consists of a slide on each of the following unrelated, but fascinating elements: einsteinium, curium, radium, radon, nobelium, seaborgium, silicon, magnesium, and postassium. You will not find detailed information on the...
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Chemical Formulas
Here is an interesting lesson which invites learners to focus on understanding and interpreting the symbols used in writing and communicating information about chemical elements, compounds, and equations. The hope is that this knowledge...
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How Does Radon Get Into Your Home?
Students examine their home and calculates the amount of ventilation found. They also compute the surface area of different objects. They determine what is needed to reduce the amount of radon entering the home.
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How Does Radon Get Into Your Home?
Students complete an experiment in which they measure the radon level in their home. They examine the different types of units of measurement and practice using them throughout the activity. They calculate surface area on objects as well.