Oct. 1 - Bohr-Rutherford Diagrams

I handed back the Density Quiz today.  Here are the solutions:

• Density Quiz Solutions (Period 1)
• Density Quiz Solutions (Period 4)

Next we discussed an interesting element: carbon.  Carbon can come in may different forms, each with vastly different properties.

Handout: Graphite to Diamonds

Bohr-Rutherford Diagrams

Learning Goals: Understand the structure of atoms.

Success Criteria: You can draw the Bohr-Rutherford diagrams for the first 20 atoms on the periodic table.

First you must know how to find the number of protons, neutrons and electrons in each atom.  Here's a worksheet for you to practice:

Handout: Subatomic Particles Worksheet

Next we went over how to draw Bohr-Rutherford diagrams.  Here are the steps:

1. Determine the number of protons and neutrons.
2. Write it in the middle (nucleus.)
3. Determine the number of electrons.
4. Put the electrons in concentric shells (orbitals)

• First orbital can hold up to 2 electrons.
• Second orbital can hold up to 8 electrons.
• Third orbital can hold up to 8 electrons.
• Fourth orbital can hold up to 8 electrons.

Handout: Bohr-Rutherford Diagrams

Here's an example: http://www.youtube.com/watch?v=wy83UlGQpWw

Here are the solutions:

Homework: Complete the handouts and answer the questions to find patterns with these diagrams.

Dr. Manhattan from Watchmen has a Bohr-Rutherford diagram of hydrogen on his forehead!