NASA
MASS, MASS – Who Has the MASS? Analyzing Tiny Samples
What is it worth to you? A hands-on lesson plan asks groups to collect weights of different combinations of coins and calculate weighted averages. They use the analysis to understand the concept of an isotope to finish the third lesson...
Curated OER
Radioactive Isotopes
Students describe an isotope and radioactive isotope in a written essay. They describe how a specific country or region was affected by radioactive contamination and attempt to sympathize with those affected by these radioactive...
Curated OER
Half-Life Problems
In this half-life worksheet, students calculate the half-life of isotopes, they find masses of isotopes remaining after specified times, and they find particular amounts of time needed to pass for given masses of isotopes to decay.
Curated OER
Calculating Half-Lives
For this calculating half-lives worksheet, students will use a table with a list of various isotopes and their half-lives to answer 5 problems.
Curated OER
Calculating Half-Life Problems
In this half-life worksheet, students are given a particular mass of an isotope of cesium and its half life. They are to determine how much cesium will remain after 90 years. They are guided through the problem solving process.
Curated OER
Regents High School Examination PHYSICAL SETTING CHEMISTRY 2007
The University of the State of New York has designed a series of exams to be given to high schoolers. This chemistry exam is one of the most comprehensive and well-written that you will ever find. It consists of 84 questions in a variety...
Curated OER
Isotope Notation
In this chemistry worksheet, students calculate protons, electrons and neutrons in ions and neutral atoms to complete 2 charts.
Curated OER
Unit 2 ~ Atomic Structure
As an atomic structure reference and review tool, this handout fits the bill. The first page provides definitions and tables of orbitals, electrons, and energy levels. The second page is an opportunity to practice determining numbers of...
Curated OER
Chapter 2 and 3 Practice Worksheet - Formulas and Compounds
In this formulas and equations worksheet, chemistry apprentices write the chemical formulas given the names. They calculate percent composition, balance equations, and calculate the mass of a substance present in a fertilizer. This is a...
Royal Society of Chemistry
Atomic Structure
Changing the number of neutrons in an atom makes it an isotope, but it does not change the element. Pupils complete logic puzzles, matching isotopes with their unique number of protons, neutrons, and electrons. Either on paper or timed...
Science Geek
Atomic Structure
The International Union of Pure and Applied Chemistry (IUPAC) was formed in 1919 and was crucial for allowing scientists to discuss findings during the Cold War. A presentation offers an introduction to atomic structure including the...
College Board
2004 AP® Environmental Science Free-Response Questions
Radioactive isotopes have a wealth of uses, but their waste may cause some concern. One of four free-response questions challenges learners to devise a waste removal strategy for medical radioactive substances. Other questions address...
Curated OER
How Does Your (Coral) Garden Grow?
Analyze and graph oxygen isotope ratios in coral samples in relation to the distance from the outer skeleton edge. Compare the data to the mean monthly water temperatures. Uncover whether or not there is any correlation. In addition to...
Curated OER
Half-life Worksheet
In this half-life activity, students determine how long it takes for a 100g sample of AU-198 to decay to 6.25g. Then they determine the half-life of a radioactive isotope if a 500.0g sample decays to 62.5g in 24.3 hours. Students also...
Teach Engineering
Understanding Elements
Nothing says organization quite like a table. The third lesson in a six-part Mixtures and Solutions unit teaches young scientists about elements and the periodic table. They learn how the periodic table is organized and about the...
Curated OER
Chemistry Foundations
Extensive notes on foundational chemistry concepts make up this resource. It summarizes the properties of matter, the periodic table, chemical nomenclature, and general chemical bonding. Design a set reading comprehension questions to go...
Curated OER
Difference One Proton Makes
Chemsitry aces learn that protons are located in the nucleus and the number of protons in the nucleus determines the atomic number of an element. In this lesson plan, they compare materials made up of a single element and other materials...
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Physics 152 Fall 2004 Final Exam, Parts A, B, C, D
At the end of a general physics course focused on light and electricity, you can administer this exam. Concepts covered include electromagnetism, circuits, induction, light rays, lenses and mirrors, characteristics of light, electron...
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The Nature of Molecules
Even though the questions on this learning exercise pertain to general chemistry, it was created for an AP biology course. It is crucial for biology learners to grasp these concepts as a foundation for biochemical processes that they...
Curated OER
Chemical Context of Life & Water
Some basic chemistry concepts are fundamental to understanding biology. Learners explore how molecular structure plays a role in biological processes, especially the structure of the water molecule. The final page focuses on water's...
Curated OER
Carbon and The Molecular Diversity of Life
Biodiversity begins at the molecular level. When biology pupils complete this worksheet, they will explore a variety of organic compounds that are necessary for life. Six short-answer questions and a chart of the functional groups are to...
Curated OER
Atomic Structure
A basic presentation to introduce some of the terminology regarding atomic weight, atomic structure, and atomic number awaits your students. An example of the calculations finding average atomic mass for carbon is given, and a way of...
Curated OER
The Building Blocks
This PowerPoint is a comprehensive review of all the facts related to an atom's basic structure and function. What makes this unique is that it is geared toward an audience of junior geologists. After introducing the periodic table of...
Curated OER
Atomic Theory, Structure, and Symbols
In this atomic theory worksheet, students review the observations that led to the conclusion of the atom having a positively charged nucleus. Students compare atomic number and mass number and explain how the discovery of subatomic...
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