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...

In this atom worksheet, students complete 60 questions about the trends in atoms such as ionization energy and atomic radius, about valence electrons, about the families of elements, about metals, non-metals and semi-metals, about the...

In this chemical bonding worksheet, students answer 76 questions about compounds, Lewis dot structures, intermolecular forces between atoms, electronegativity and bonding and types of bonds.

For this atoms worksheet, high schoolers complete 58 questions about the atomic radius of atoms, the ionization energy, the valence electrons, metals, non-metals and semi-metals and the families of elements.

In this elements and bonding worksheet, high schoolers classify given elements, they identify valence electrons in atoms, they explain the reactivity of elements, and they explain why certain atoms gain electrons while others lose...

In this molecules learning exercise, students review the parts of an atom and use element mass to determine isotopes. Students give the group, period, and classification for the given elements. This learning exercise has 6 short answer...

In this modern atom worksheet, learners answer 7 questions about electron configurations of atoms, flame tests, spectroscopy, the energy of electrons and quantum numbers. Students write electron configurations and orbital filling diagrams.

In this periodic table worksheet, students use the periodic table to complete the chart with the given elements. Students fill in the atomic number, atomic mass number, protons, neutrons, and electrons.

In this periodic table worksheet, students complete a crossword puzzle given 19 clues about elements, symbols, properties of elements, atomic number and atomic masses of elements.

For this making compounds worksheet, students are given 5 atoms and they draw a diagram of each. They identify the atom to the right of each and name the compound they make. Students define the terms compound, molecule and chemical...

In this periodic table of elements worksheet, students are given clues and descriptions for elements in order to determine where they belong in the "Martian Periodic Table". They place the elements in the proper place in the given...

In this electronegativity worksheet, high schoolers use given electronegativity values for each element to determine the bond type in 9 molecules.

In this elements worksheet, students write in the symbol of the chemical element that matches its description. This worksheet has 10 fill in the blank questions.

In this general chemistry assessment, students complete a series of multiple-choice and short-answer questions on elements, chemical properties, and various chemical reactions.

This compendious collection of slides leaves no questions when it comes to the concept of atomic size. Thorough and easy-to-read graphs, tables, and graphics explain atomic radii, the shielding effect, the octet rule, isoelectric...

Upcoming chemists construct atom or molecule models out of candy. This is a classic idea that learners really enjoy; however, this lesson plan is vague. There is no instruction about the structure of atoms or molecules. Make sure you...

Uranium 235 has a half-life of over 700 million years and is the fuel used in the atomic bomb dropped on Hiroshima, Japan. Pupils see the half-lives and decay rates of Carbon-14 and Uranium-238. They also take measurements of these two...

Learners examine how scientific theories are developed. In this matter lesson plan, students explore the basic idea of quantum theory. They create a timeline of scientists, their contributions, and discoveries.

For this matter worksheet, learners review the three forms of matter by reading a poem and completing 1 matching and 5 short answer questions.

Students practice drawing the atomic structure of several different elements. They complete critical thinking questions about atomic structure and compare the atomic mass units for different ions and isotopes of an element.

In this elements worksheet, students review the Bohr model and define negative and positive subatomic particles. Students compare molecules and compounds. This worksheet has 11 short answer questions and 4 problems to solve.

For this atoms worksheet, learners determine an atoms based on its protons, and neutrons. Students determine the electron levels for the oxygen atom. This worksheet has 1 multiple choice, 4 fill in the blank, and 13 short answer questions.

Students identify and describe the building blocks that make up an atom. They also compare the ages of atoms to the ages of the materials they compose,as well as, give examples that illustrate the small size of atoms.

Pupils determine the average mass of a new element using masses from three isotopes. In this chemistry instructional activity, students explain what an isotope is. They discuss their importance and uses.