Science 9

Chemistry - Grade 9

Check out the The Royal Society of Chemistry - Periodic Table online.

The Bohr Model, lesson: https://opentextbc.ca/chemistry/chapter/6-2-the-bohr-model/

Bohr's Theory of the Hydrogen Atom – College Physics: https://opentextbc.ca/physicstestbook2/chapter/bohrs-theory-of-the-hydrogen-atom/

The theory of electron waves, by Louis de Broglie:

         Louis de Broglie - Nobel Lecture: "The wave nature of the electron".

Lecture on Khan Academy:

https://www.khanacademy.org/science/physics/quantum-physics/atoms-and-electrons/v/de-broglie-wavelength

         electron defraction patterns, wavelike behavior

         what is the waving of an electron? Quantum Wavefunction

Electrons must not interfere with themselves: https://www.youtube.com/watch?v=kpa_HO6yy18

      see also: https://youtu.be/JIGI-eXK0tg?t=249

      see also: https://www.visionlearning.com/en/library/Chemistry/1/Atomic-Theory-III/223

      Electrons and standing waves: https://www.youtube.com/watch?v=oLd-6UytkIU

      Why is light slower in glass? https://www.youtube.com/watch?v=CiHN0ZWE5bk and https://www.youtube.com/watch?v=YW8KuMtVpug.

                  keywords: 

                   can light travel faster than Einstein's speed of light?, photons interfering with themselves,  light speed phase velocity, polariton,

                   refraction index, phase shift,

Hands-on Projects...

Design a paper experiment where wave and circle cutouts have to be fitted to a certain radius. Have the students fit clones of the wave piece in a circlular manner.

Have the students understand why some lengths fit and why others don't. Begin with at least 3 or 4 waves (peaks).

Wave-Particle Duality and the Photoelectric Effect

read more about: Atom Vibrations in Solids

What is "zero point energy"? http://scienceline.ucsb.edu/getkey.php?key=3561

Why do atoms vibrate? Ask a question on researchgate: https://www.researchgate.net/post/Why_the_atoms_are_naturally_vibrating_with_a_definite_frequency

Vibrations handout (@ physics.uwo.ca): http://www.physics.uwo.ca/~lgonchar/courses/p2800/Chapter4c_Vibrations_Handouts.pdf

Millikan Oil Drop Experiment, 1909: Measuring the charge of the electron.

Quizzes

Lessons

Free Online learning "Concepts in Chemistry", from Dalhousie University, full lectures and digital practice materials:

                            http://conceptsinchemistry.com/students_lecturebook.html.

First year university covered, which is nearly the same as grade 11-12 Chemistry.

Lessons: Chemistry-20, Chemistry-30

Lessons: So, you think you might be interested in learning some Chemistry?

Chemistry Card Games

Articles

Did you know? Since there were mixtures of isotopes of different atomic weights in samples of elements found in nature, the IUPAC began publishing atomic weights with uncertainties. The first element to receive an uncertainty in its atomic weight was sulfur in 1951. By 2007, 18 elements had associated uncertainties, and in 2009, IUPAC began publishing ranges for the atomic weight of some elements. Read more...