Atoms or Molecules?

Molecules to the Max! refers to a movie released in 2009 about the world of atoms and molecules. A helpful discovery guide provides five posters on science topics typically covered at the middle school level. It also explains the...

Newcomers to chemistry compare hydrogen peroxide to water, realizing that the difference of one oxygen atom significantly affects the chemical properties. Other pairs of compounds and their formulas are also examined. A few chemical...

Young scientists construct an understanding of molecular compounds in this hands-on science lesson. Using LEGO® to model the atoms of different elements, students build molecules based on the chemical formulas of common compounds.

Are atoms too small to be isolated? Answer this question and more as you provide young chemists with the tools to conduct a hands-on activity demonstrating atomic mass. Pupils explore the mass of copper and aluminum,...

Using helium as an example of propane, physical science middle schoolers experiment with and graph the relationship between temperature and volume in gases. In a whole-class demonstration, they show how molecules behave under different...

Imagine if scientists today were killed for their thoughts, ideas, and beliefs. And yet, Antoine Lavoisier was beheaded for just those things in 1794. Learn about this fascinating aspect of science along with the contributions of...

Science concepts often span multiple disciplines. Learn strategies for helping pupils make the connections more effectively using an episode from the Good Thinking PD series. The lesson focuses on the concept of cells and atoms as they...

From ancient Greek philosophers to early American Quakers, people have sought to understand the composition of matter for millennia. Follow along with this video as it explores the long scientific journey that eventually led to the...

There's nothing sticky about the resource, unless you count the gumdrops! Scholars create a model of a lithium atom, complete with protons, neutrons, and electrons. It's just that these models are made with gumdrops and toothpicks.

Students investigate molecules through 2 demonstrations and writing formulas for molecules given the oxidation states of the atoms. In this molecules lesson plan, students observe iron filings being separated from salt and pepper using a...