Young scientists will be thrilled to explore the invisible world of atoms, molecules and elements. Our resource makes the periodic table easier to understand. Begin by answering, what are atoms? See how the atomic model is made up of electrons, protons and neutrons. Find out what a molecule is, and how they differ from elements. Then, move on to compounds. Find the elements that make up different compounds. Get comfortable with the periodic table by recognizing each element as part of a group. Examine how patterns in the period table dictate how those elements react with others. Finally, explore the three important kinds of elements: metals, nonmetals and inert gases. Aligned to the Next Generation Science Standards and written to Bloom´s Taxonomy and STEAM initiatives, additional hands-on experiments, crossword, word search, comprehension quiz and answer key are also included.