# 2022-2023 Objectives Of Atomic Structure And Equations

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2021-2022 Objectives of Atomic Structure

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 (using atom info) and the definition of Law of Definite Proportion problems.
• c) 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.
• d) 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 draw his nuclear model
• e) 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).
• g)Will leave charged cloud model (quantum mechanical model) of atom until next chapter/test.

2. Explain what light is in terms of DeBroglie, Planck (particle characteristics), and light characteristics.

3. 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.

4. Be able to calculate energy, wavelength and frequency using all appropriate equations and how the variable relate to each other (e.g. direct vs, indirect proportion).

5. Be able to calculate the wavelength in nm (color) from the energy (in J) released/emitted when electron's fall back down to the original energy level from the high energy level. Also the visa versa calculations (energy to wavelength).

6. Be able to explain the significant of a bright line spectra and what each line indicates (mean with respect to the atom).

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