ChemistryWiki | RecentChanges | Preferences
Objectives of Atomic Structure - Revised 2022-2023
Essential Questions (EQ2): Are there any basic particles ?
The student should be able to:
1) Trace the development of atomic theory and the structure of the atom from the Greeks (Democritus) to the present (Dalton, Thompson, Rutherford, and Bohr).
- a) Memorize Democritus and his atomos thought concept (no experiments).
- b) Dalton Atomic Theory
- i) Understand the four part of Dalton Atomic Theory, how we have updated his original theory, and the importance of his theory.
- ii) Be able to explain how Dalton (including his atomic theory name, Solid sphere model) expanded the Law of Conversation of Mass (to total number & each type of atom) using atom info) and the definition of Law of Definite Proportion problems.
2) Explain, using the experiment set-up and the results, how Thomson came up with the concept of electron (and the fact that their is only one type of electron). From his work, explain the atomic model and be able to draw the Plum pudding model of the atom.
3) Explain, using the Gold leaf experiment set-up and the results, how Rutherford came up with the concept of nucleus (remember, there are 3 characteristics) and how the electrons move outside the nucleus. Be able to name and draw his atomic model.
4) Explain and draw Bohr's (planetary model of the atom) theory of the atom including distance electron from nucleus = energy in electron, how electrons move in atoms (ground state of atom, excited state of atom, electron in lower energy level, electron in higher energy level).
5) Explain what light is in terms of DeBroglie, Planck (particle characteristics), and light characteristics.
6) Describe the electromagnetic spectrum in terms of wavelength and energy; memorize the infrared and ultraviolet region w.r.t. visible spectrum and memorize red is 700nm and violet is 400nm.
7) Be able to "calculate" energy, wavelength and frequency using your understanding of directly and indirectly proportions (i.e. helps to memorize the Light and Energy equations).
8) Be able to explain what a bright line spectra looks like, what is the importance of it to identify an element and what each line indicates (mean with respect to what is happening in the atom).
9) Be able to name, draw and explain all the different atomic model in the Brief History of the Atom handout.