Sometimes modeling is the best approach to working with microscopic particles. A lab investigation models a fictional element using pasta. The setup uses three different pasta types to represent three different isotopes. Learners...

Using a chart of student test grades as an example, curious chemists learn how to calculate weighted averages. They apply this knowledge to elements on the periodic table. As practice in calculating average atomic masses, learners...

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...

In this periodic table worksheet, students review atomic mass, molar mass, and percent composition of compounds. Then students complete 4 problems.

An engaging activity enlightens young chemists in this lesson on atomic structure. They play musical chairs through a series of concentric circles that represent electon orbitals. A laundry basket in the middle holds the protons and...

By focusing on "Candium", pupils can work through this guide to learn more about different isotopes.  The teacher will supply M&M's, Skittles and Reeses Pieces to provide data about mass and abundance.

In this isotopes worksheet, students calculate an average atomic mass of specific elements. This worksheet has 4 problems to solve.

In this average atomic masses activity, students solve 3 problems. They find the average atomic mass using data from a mass spectrometer, they find the average atomic mass of an element using isotope information and they explain how a...

In this atomic weight and ions learning exercise, students answer questions about isotopes of atoms and how it relates to atomic weight. They also write out oxidation or reduction reactions for given atoms undergoing loss or gain of...

In this formulas and equations learning exercise, 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....

In this masses of atoms worksheet, students complete a chart of 7 isotopes with their isotope symbol, atomic mass, atomic number, and the number of protons, neutrons and electrons. They calculate the average atomic mass of two elements.

In this atomic structure and periodic table worksheet, students complete a table with isotopes, their atomic masses, the number of protons, neutrons and electrons and mass number. They also find the average atomic mass of atoms and...

In "Nuclear Arthmetic," first-time physical scientists examine atomic structure and the periodic table of elements. The are given the formula, "N = A-Z," in which N is the number of neutrons, A is the atomic mass, and Z is the atomic...

In this atom instructional activity, chemists learn how to determine the number of protons, neutrons and electrons in an atom using the atomic mass and atomic number. They complete a chart of the subatomic particles and use marbles to...

Thirty multiple-choice questions and their answers are provided in this resource. It was written for a general chemistry course and queries test takers on scientific notation, mixtures, chemical symbols, electric charges, Dalton's atomic...

Using the periodic table of elements, young chemists fill in a chart of isotopes to show the atomic number, mass, charge, number of protons, number of neutrons, and number of electrons. The chart is followed by 11 questions that...

An online resource, this worksheet has your chemistry learners complete four data tables with information about atoms and chemical bonds. The first table addresses atomic number and mass, as well as numbers of protons, neutrons, and...

In this average atomic mass worksheet, students read about how the protons and neutrons make up the atomic mass of an element. They find the average atomic mass given four problems.

In this charge and mass worksheet, students complete a table by indicating the atomic number, the number of protons, the number of neutrons, the number of electrons and the mass number in given elements and isotopes. They compare...

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...

Although the focus of this activity is the neutron, you cannot talke about them without also dealing with protons and electrons! Chemistry kids fill in a table of 14 elements, identifying the mass, atomic number, isotopic symbol, and...

In this atoms learning exercise, students review atomic number and mass number of atoms plus what happens when an atom is radioactive. This learning exercise has 8 fill in the blank and 9 short answer questions.

In this isotopes worksheet, high schoolers find the average atomic mass given the masses of two isotopes. They also calculate the atomic mass of elements given the percentages of each isotope.

In this atoms worksheet, high schoolers review atoms, atomic number, and mass number. Students determine what happens when atoms become radioactive. This worksheet has 8 fill in the blank and 9 short answer questions.