During this hands-on activity, young chemists build molecular models based on the Lewis dot structure before studying valence shell electron pair repulsion theory. 

Lewis dot diagrams, Lewis dot structures, and electron dot diagrams are all the same thing. Young scientists learn how to draw Lewis dot diagrams and come to understand how dots and dashes represent valence electrons and ionic or...

In this elements learning exercise, students 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 learning...

In this atoms worksheet, students complete a graphic organizer by writing in the number of electrons, valence electrons, electron configuration, orbital box diagram, probability diagram, and Lewis Dot diagram for the given atoms and ions.

For this families of the periodic table worksheet, students complete a table with the characteristics of elements in the 10 families of the periodic table. Students fill in the blank sections using their text book as a resource. They...

In this VSEPR theory learning exercise, high schoolers build models of molecules using styrofoam balls and pipe cleaners to represent lone pairs. Students complete a chart for 12 molecules with valence electrons, Lewis structures, bond...

This is a tremendous overview of the tiny atom. Journey through the history of human understanding of this basic building block of matter. Examine each of the sub-atomic particles in detail: neutrons, protons, electrons, quarks. Peruse...

This PowerPoint provides a complete recap of all the information needed for a unit on elements and the periodic table. The seventy slides cover the basic notation of elements, energy levels and ionization energies. The trends in the...

In this Lewis structures worksheet, students draw molecular structures for twelve molecules. They determine the number of bonds in the molecular formula by following step by step directions given on the worksheet.

In this electron dot structures handout, new chemists read about electron arrangement and how to draw electron dot diagrams. They complete a chart with the mass number, atomic number, isotope notation, number of neutrons, and Bohr...

At the top of the page are a reading passage and colorful diagram that depicts the tug-of-war that occurs between bonding molecules due to electronegativity. High school chemists fill in a chart with electronegativity values, the...

Neatly organized and easy to read, this chart summarizes five different molecular shapes: linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral. It associates shapes with electron pairs and atom arrangement and lists...

This is an online exercise in which chemistry learners answer a series of multiple choice questions about bonding. Topics addressed include ionic and covalent bonds, electronegativity, ions, valence electrons, resonance structure, and...

First, beginning chemists assemble a large periodic table of elements. Then, they play a game in which they roll dice, move a marker along the elements, and collect pennies according to the number of valence electrons of the element that...

Students investigate combining positive and negative ions to form products. In this precipitation stoichiometry lesson plan, students make 8 combinations of ions from a given list and predict the optimum combining ratio. They record the...

In this Lewis structures worksheet, students identify and describe what Lewis structures or dot diagrams are and how they illustrate the valence electrons in an outer shell. Then they use a periodic table to determine the numbers of...

In this chemistry activity, students complete the chart for each of the listed elements, including the number of protons, electrons, and valence electrons. Then they complete each of the ionic bonds that follows.

In this chemistry worksheet, students complete the chart for each of the given elements by naming the number of protons, electrons, Valence electrons, and the electrons used to fill the outer shell. Then they complete each covalent bond...

In this elements instructional activity, students compare the properties of elements in the periodic table such as their atomic radii, valence electrons and ionization energy.

For this elements worksheet, students write the complete electronic configuration and the number of valence electrons for elements. Students classify elements based on their electronic configuration. This worksheet has 5 problems to solve.

This science presentation focuses on the elements in the periodic table. It begins with the parts of an atom, explaining atomic mass and atomic number, valence electrons, and isotopes. Then it moves on to discuss various ways of...

In this atoms worksheet, students complete a graphic organizer by filling in the number of atoms, number of electron pairs, number of long pairs, bond angle, and molecular shape.

A 12-page midterm exam sample can be given to young scientists in preparation for an exam. This particular installment is geared toward a class that delves into both ecology and chemistry concepts. There is no way to separate the 50...

Your young chemists will find these slides very informative. Groups and periods of the periodic table are labeled and described according to the charge. Comprehensive explanations of physical and chemical properties and how they relate...