Chemical elements are made up of atoms. Describe what makes up an atom.
What is meant by "atomic number"? How does it differ from "mass number"? Which is the same for all atoms of a given chemical element?
What are the distinctive properties of electrons, protons and neutrons? Compare them.
What determines the bounds of the rows of the periodic table of the elements?
Why is it periodic?
Georgia QCC, Grade 6 Standards