how to make 3D Bohr atomic working model that rotates

Creating a 3D Bohr atomic model of nitrogen that can rotate using GI metal wire, plastic balls, and a slow rotating motor can be a great science project for an exhibition.

Here’s a step-by-step guide to help you make this model:

Materials Needed:

  • GI metal wire (Gauge suitable for crafting, such as 16 or 18)
  • Plastic balls (7 red for protons, 7 white for neutrons, and 7 blue for electrons)
  • Slow rotating motor with battery pack and switch
  • Cardboard or plastic base
  • Hot glue gun or strong adhesive
  • Small battery holder and batteries
  • Insulated wire
  • Soldering iron and solder (optional, for secure connections)
  • Needle-nose pliers
  • Wire cutters

Steps by Steps Video Instructions:

1. Prepare the Nucleus:

  1. Create the Nucleus Frame: Use the GI metal wire to create a small spherical frame to hold the protons and neutrons. You can do this by bending and twisting the wire into a cage-like structure.
  2. Attach Protons and Neutrons: Glue the red plastic balls (protons) and white plastic balls (neutrons) inside the spherical frame, ensuring they are mixed together evenly. Use hot glue to secure them in place.

2. Prepare the Electron Orbits:

  1. Create Orbit Rings: Form three rings using the GI metal wire to represent the electron orbits. The rings should be concentric and large enough to allow space between them.
    • The first ring will have 2 electrons.
    • The second ring will have 5 electrons.
  2. Attach Electrons: Glue the blue plastic balls (electrons) onto the orbit rings. Place 2 electrons on the first ring and 5 electrons on the second ring. Space them evenly around the rings.
  3. Connect Orbits to Nucleus: Use small pieces of GI wire to attach the orbit rings to the nucleus frame. Ensure the rings are centered around the nucleus and secure them in place with glue or by twisting the wire.

3. Prepare the Rotating Mechanism:

  1. Mount the Motor: Secure the slow rotating motor to the center of the cardboard or plastic base using screws or strong adhesive.
  2. Attach the Nucleus to the Motor Shaft: Use a short piece of GI wire to connect the nucleus frame to the motor shaft. Ensure the connection is strong and balanced to prevent wobbling when the model rotates.
  3. Wire the Motor: Connect insulated wires from the motor to the battery holder. If using a soldering iron, solder the connections for a more secure setup.
  4. Add a Switch: Connect a switch between one of the motor wires and the battery holder to control the power.

4. Assemble the Model:

  1. Attach the Orbit Rings to the Base: Use additional GI wire to secure the outermost parts of the orbit rings to the base. This will provide additional stability.
  2. Test the Rotation: Insert batteries into the battery holder and test the motor. Ensure the nucleus and electron orbits rotate smoothly.
  3. Secure All Connections: Double-check all connections and glue points to make sure everything is securely attached.

5. Final Touches:

  1. Decorate the Base: Cover the base with colored paper or paint it to make the model more attractive.
  2. Label the Model: Add labels to indicate protons, neutrons, and electrons. You can also add a brief explanation of the Bohr model and how it represents the nitrogen atom.
  3. Instructions and Safety: Include a note on how to operate the switch and safety precautions regarding the rotating parts.

This 3D rotating model of the nitrogen atom will visually and interactively demonstrate the Bohr atomic structure, making it an excellent project for a science exhibition.

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