Atoms, Elements and Compounds

Learning Objective

In this lesson we will revise the classification of matter and atomic structure.

Learning Outcomes

By the end of this lesson you will be able to:

  • Distinguish between pure substances and mixtures.
  • Distinguish between elements and compounds.
  • Describe the arrangement of atoms in pure substances.
  • Describe the subatomic structure of atoms, including protons, neutrons and electrons.
  • Define atomic number and mass number, and explain what isotopes are.
  • Describe the configuration of electrons for the first 20 elements.

atoms elements and compounds

(Image: vchalup, Adobe Stock)

(Header image: geralt, Pixabay)