# CP Objectives For Atomic Structure, Isotopes And Atomic Mass

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Objectives of CP Atomic Structure and Atomic Mass

Essential Questions (EQ2): Are there any basic particles ?

The student should be able to (bold numbers are MA Framework Standard numbers):

1) Know the characteristics of subatomic particles including charge and location for an element.

2) Define isotope and be able to write the two symbolic representation of isotope.

3) Define atomic number and find it on a Periodic Table.

4) Define Mass Number and be able to calculate the correct number of each subatomic particle of an isotope knowing the Atomic Number and Mass Number.

4) Define atomic mass and be able to calculate atomic mass using the table method highlighted in class.

1. Trace the development of atomic theory and the structure of the atom from the Greeks to the present (Dalton, Thompson, Rutherford, Bohr, and charge cloud model).

• a) Memorize what the significant contribution to the atomic structure from Boyle, Stahl, Priestley, Lavoisier, Proust, Gay-Lussac, Avogadro
• b) Understand the four part of Dalton Atomic Theory, how we have updated his original theory, and the importance of his theory.
• c) Be able to calculate Law of Definite Proportion problems.
• d) 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, Plum pudding model of the atom.
• e) Memorize what the following scientist did: Millikian (oil drop expt, determine actual mass & charge of electron), Goldstein (discovered proton), and Chadwick (discovered neutron).
• f) Memorize the actual mass, charge and location of all three subatomic particles (i.e. electrons, protons, and neutrons).
• g) 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).
• h) Explain 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).
• Will leave charged cloud model (quantum mechanical model) of atom until next chapter/test.

2. Define isotope and be able to write the two symbolic representation of isotope.

3. Define atomic number and find it on a Periodic Table.

4. Define Mass Number and be able to calculate the correct number of each subatomic particle of an isotope knowing the Atomic Number and Mass Number.

5. Define atomic mass and be able to calculate atomic mass using the table method highlighted in class.

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