Atomic Structure

Categories Chemistry

Course Description

Atomic Structure is a cornerstone module that introduces learners to the microscopic architecture of matter. Atoms are the smallest units of elements that still retain their chemical identity, and understanding their structure unlocks the secrets of chemical reactions, bonding, and the diversity of substances in our universe. This lesson lays the groundwork for deeper exploration into molecular chemistry, periodic trends, and the behavior of compounds.

What You’ll Learn

🧬 By the end of this lesson, you’ll be able to:

  • Identify the main components of an atom:
    • Protons – positively charged particles found in the nucleus
    • Neutrons – neutral particles also located in the nucleus
    • Electrons – negatively charged particles orbiting the nucleus in energy levels or shells
    • Understand how these subatomic particles determine atomic identity and behavior
  • Understand atomic number, mass number, and isotopes:
    • Atomic number = number of protons; defines the element
    • Mass number = protons + neutrons; indicates atomic mass
    • Isotopes = atoms of the same element with different numbers of neutrons
    • Explore how isotopes affect stability and applications (e.g., carbon dating, medical imaging)
  • Explore how atomic structure influences element behavior:
    • Learn how electron arrangement affects reactivity, bonding, and chemical properties
    • Understand valence electrons and their role in forming molecules
    • Connect atomic structure to placement on the Periodic Table and predict element interactions

Who This Lesson Is For

This lesson is ideal for students beginning their chemistry journey, educators introducing atomic theory, and anyone curious about the invisible building blocks of matter.

A free course by

Course Duration: 35m
Course level:Beginner

Requirements

  • Basic understanding of matter and elements
  • Interest in physical science and molecular interactions

Target Audience

  • Middle and high school science students
  • First-year college chemistry majors
  • Educators teaching atomic theory and periodic trends
  • Future scientists, healthcare professionals, and engineers
  • Lifelong learners fascinated by the structure of the universe