Curated OER
Periods and Groups; Valence Electrons; Masses
In this elements instructional activity, learners read how the elements are organized in periods and groups in the periodic table. Students use the periodic table to find the valence electrons and calculate molecular mass. This...
Curated OER
Molecules, Moles and Molar Masses
In this molecules, moles and molar masses worksheet, students find the atomic masses of 8 elements, they write the formulas for 6 diagrams of molecules and they find the molecular masses of 12 compounds. Students also find the fraction...
Curated OER
The Dalton Model
In this Dalton worksheet, students read about John Dalton and his contributions to understanding the atom. Students are given sample data for Dalton's experiments and they answer questions about the data in his experiments.
Curated OER
Main Group: Properties and Reactivity
In this main group activity, students apply their knowledge of the organization of the periodic table to correctly answer 30 multiple choice questions. Students relate information about the properties of the different groups and their...
Curated OER
Tootsie-Roll Pop Chemistry
Middle schoolers use Tootsie-Roll Pops to become familiar with atoms and chemical formulas. They, in groups, find more combinations of Tootsie-Roll Pops than the other lab groups within 3 minutes (Round 1), and within 5 minutes (Round 2).
Curated OER
Matter, Matter
Students define vocabulary related to the parts of the atom. In this matter lesson, students navigate the web to find the structure and the forces that affect atoms. Students complete an experiment with positive and...
Curated OER
Formula Mass Calculations
In this atoms worksheet, students calculate the formula mass for chemical compounds. This worksheet has 12 problems to solve.
Curated OER
Periodic Table Assignment
In this periodic table worksheet, students complete a crossword puzzle given 22 clues about elements in the periodic table, periodic law, properties of elements and atomic mass and number. Students also fill in a periodic table to...
Curated OER
Interpreting Chemical Formulas
In this chemical formulas learning exercise, students determine the number and type of each atom and the total number of atoms for the given formulas. Students complete 10 problems.
Curated OER
The Great Atomic Debate
In this atomic theory worksheet, students write a skit given a story line using Aristotle, Democritus and Dalton. They are given internet sites to find information about the facts and ideas of these past contributors to science.
Curated OER
Mixtures, Solutions and Matter
For this mixtures, solutions and matter worksheet, students are given 12 terms and they cut out 12 definitions to match with the terms. Topics include types of mixtures, types of matter such as atoms, molecules and compounds and solutions.
Curated OER
Electron Dot Structures/Lewis Structures
In this elements learning exercise, students practice drawing electron dot structures for atoms. Students draw the Lewis Structures for molecules with single and multiple bonds plus polyatomic ions. This learning exercise has 33 problems...
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Chemical Changes in Matter
In this matter and chemical changes worksheet, students write symbols and formulas for 2 chemical reactions. They write words for 1 chemical reaction given in symbols and formulas. They draw a diagram representing a chemical reaction and...
Curated OER
Periodic Table Basics Make-Up Test
In this periodic table activity, students complete a table of elements with their atomic number, atomic mass and symbol. They classify elements by their group name and distinguish between metals, nonmetals, and semi-metals. They also...
Curated OER
Classification of Matter
In this classification of matter worksheet, students answer 15 questions about solids, liquids and gases, types of mixtures and compounds vs. elements. They also answer 2 questions about measurement and 1 question about a biome.
Curated OER
Why are Electrons Important?
Students write electron configuration of elements using atomic numbers and they identify valence electrons. In this electrons lesson plan, students observe a demonstration showing the space-filling property of an electron. They also...
Curated OER
What is Matter?
In this matter worksheet, students answer 6 questions about matter. Students distinguish between homogeneous and heterogeneous mixtures, they identify elements and compounds and they distinguish between pure substances and mixtures.
Curated OER
Unit 4 - Periodic Table
There are 17 multiple choice questions on this periodic table test. The focus is on properties of the elements by group and period. The exam is not formatted well, making it a little difficult to read. There is also a typographical...
Curated OER
Teaching Atomic Structure Using Cooperative Learning
Individuals in a group of four each take on a different role: atomic number expert, mass number expert, isotope expert, and nuclear atom expert. They teach each other about their area of expertise. As an assessment, a short quiz is...
Curated OER
Science Puzzle
In this science worksheet, students identify and locate vocabulary words related to various sciences. There are 20 words located in the word search.
Curated OER
The Structure of the Elements
In this chemistry worksheet, students study the composition of the elements in the periodic table using an interactive website.
Teach Engineering
Engineering and the Periodic Table
Elements, to the rescue! Scholars first review the periodic table, and then learn about the first 20 elements and their properties and uses in the fourth of six lessons in the Mixtures and Solutions unit. Applying their newfound...
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...
Curated OER
Atomic Structure
Students list the names and symbols of common elements. They describe the present model of the atom. Students describe how electrons are arranged in an atom. They identify quarks as particles of matter that make up protons and...