Chemistry 02：Atomic Structure

Have you ever wondered what goes on inside an atom? In this content activity, we will look beyond matter and into the world of subatomic particles – protons, neutrons, and electrons – their discovery, properties, and variations that make up each element.

Activities: 

I.       Atomic Theory History:

•  View the video on the discovery of protons, neutrons, and electrons
• 💡 Originals Content Tip: Teachers/students may click on the figures to open a link that goes into more details of each historical figure.

II.     Protons, Neutrons, and Electrons:

• Introduce protons, neutrons, and electrons, their charges, and mass
• Explain how the meanings behind the numbers shown on the periodic table and symbol
• Activity: Search the periodic table for calcium, write down its properties and symbol, and draw it out.

III.   Isotopes, mass number, and atomic weight:

• Explain the concept of isotopes
• Explain the difference between Mass Number and Atomic Weight
• PhET Activity: Follow the instructions on the next page and screenshot your results.

IV.  Electron Shells:

• Introduce the Bohr model and Lewis Diagram
• Activity: Fill out the Bohr model and Lewis Diagram by referencing the periodic table.

V.    Ions & Ionic Compound:

• Explain the concept of ions, cation, and anion.
• Look at how NaCl is formed.
• 💡 Originals Content Tip: Use the “pop quiz” feature and ask students to “throw” in their answers to the problems.
• PhET Activity: Follow the instructions on the next 2 pages and screenshot your results.