Unit 4: Atomic Structure
Assigned reading:
All students: Read Ch. 4 "Atomic Structure" in the white book.
AP Chemistry: You'll read Ch. 9 and a portion of Ch. 10 in the Ebbing-Gammon book. Follow the AP Compound Structure homework instructions below.
Labs
All students: Read Ch. 4 "Atomic Structure" in the white book.
AP Chemistry: You'll read Ch. 9 and a portion of Ch. 10 in the Ebbing-Gammon book. Follow the AP Compound Structure homework instructions below.
Labs
- Oxygen lab
- Build-an-Atom weblab
Handouts
| 3._build-an-atom_weblab handout.doc |
| AP_compound_structure_homework_instructions.docx |
Ch. 4 Review Exercises
Complete the following problems starting on p. 101: #3, 7, 8, 9, 10, 11, 15, 18, 20abc, 24, 26, 27, 28 abc, 30. Make sure you have all 33 answers, worth 33 points. Write them up neatly IN YOUR OWN HANDWRITING. Keep the same numbering, please! Show all calculations or you will have points deducted.
Complete the following problems starting on p. 101: #3, 7, 8, 9, 10, 11, 15, 18, 20abc, 24, 26, 27, 28 abc, 30. Make sure you have all 33 answers, worth 33 points. Write them up neatly IN YOUR OWN HANDWRITING. Keep the same numbering, please! Show all calculations or you will have points deducted.
Oxygen lab
We will make and test oxygen gas. This is a classic lab. Remember to bring the lab handout!
We will make and test oxygen gas. This is a classic lab. Remember to bring the lab handout!
| o2_lab_handout.pdf |
Videos of standing waves
It's difficult to picture electrons as 'waves' which must occupy discrete 'orbitals' or energy-levels. If you think this is confusing, you're not alone!
The vibrating "Chlodni" plates (below) might help you visualize what standing waves look like - at least in 2 dimensions anyway. As the vibration frequency is increased in the videos (representing more and more energy input), the salt crystals arrange themselves at the wave "nodes". The steel plate vibrates as a wave, and the salt can only exist at the nodes, where there is no vibration.
In the same way, electrons can occupy only "discrete" orbitals - or energy levels - around an atom. They can't just sit anywhere they want; they must occupy discrete energy levels (orbitals or shells) which are numbered 1s, 2s, 2p, etc.
When you add energy (light of a certain wavelength, for example) to an atom, the electrons can jump up to a higher orbital. Conversely, when electrons jump down a level, light energy is emitted from the atom.
It's difficult to picture electrons as 'waves' which must occupy discrete 'orbitals' or energy-levels. If you think this is confusing, you're not alone!
The vibrating "Chlodni" plates (below) might help you visualize what standing waves look like - at least in 2 dimensions anyway. As the vibration frequency is increased in the videos (representing more and more energy input), the salt crystals arrange themselves at the wave "nodes". The steel plate vibrates as a wave, and the salt can only exist at the nodes, where there is no vibration.
In the same way, electrons can occupy only "discrete" orbitals - or energy levels - around an atom. They can't just sit anywhere they want; they must occupy discrete energy levels (orbitals or shells) which are numbered 1s, 2s, 2p, etc.
When you add energy (light of a certain wavelength, for example) to an atom, the electrons can jump up to a higher orbital. Conversely, when electrons jump down a level, light energy is emitted from the atom.
Other
| 4._build-an-atom_weblab_student_example.doc |
| ch._4_atomic_structure_exercises_tips_notes.docx |
| ch._4_atomic_structure_exercises_-_student_exemplar.pdf |