Atomic Structure and the Periodic Table
Explore protons, neutrons, electrons, isotopes, ions, electronic configuration, groups and periods through interactive activities and a 50-question assessment.
Student Information
Lesson Progress
0% complete
Learning Objectives
Build an Atom Simulator
Adjust protons, neutrons and electrons. The simulator identifies atom/ion and estimates notation.
Electron Shell Builder
Enter the number of electrons to display a simple IGCSE shell configuration.
Isotope Explorer
Isotopes have the same number of protons but different numbers of neutrons.
Example
Chlorine-35 and chlorine-37 both have 17 protons, but different numbers of neutrons.
Chemical properties
They are similar because they have the same electron arrangement.
Ion Builder
Drag each idea to the correct ion type.
Loses electrons Gains electrons Positive ion Negative ionCation
Anion
Periodic Table Patterns
| Feature | Meaning | Example |
|---|---|---|
| Group number | Outer-shell electrons for main groups | Group II: 2 outer electrons |
| Period number | Number of occupied shells | Period 3: 3 shells |
| Noble gases | Full outer shell | Argon: 2,8,8 |
| Group VII | Gains 1 electron | Chlorine forms Cl⁻ |
Key Terms
Atomic number
Number of protons.
Nucleon number
Protons + neutrons.
Ion
A charged particle formed when electrons are gained or lost.
Isotope
Atoms of the same element with different numbers of neutrons.
Video Lesson
50-Question Assessment
Each question is worth 1 mark. Submit to see your score, correct answers and explanations.
0 of 50 answered
Certificate of Completion
This certifies that
Student
successfully completed