UNIT 3 - ATOMIC THEORY & ATOMIC STRUCTURE

I.    History of Atomic Theory

A.    Ancient Greeks

1.    Aristotle

2.    Democritus

B.    Dalton

C.    Thomson & Millikan

D.    Rutherford & Bohr

E.    Chadwick

F.    Quantum Mechanical Model

II.    Atomic Structure

A.    Subatomic Particles

1.    Location

2.    Charge

3.    Mass

B.    Atomic Mass Unit

C.    Atomic Number

D.    Mass Number

E.    Isotopes & Average Atomic Mass

III.    Weighing and Counting Atoms

A.    The Mole

B.    Avogadro's Number

C.    Molar Mass

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North Carolina Essential Standard and Clarifying Objectives:

Chm. 1.1 Analyze the structure of atoms and ions.

Chm. 1.1.1 Analyze the structure of atoms, isotopes, and ions.

• Characterize protons, neutrons, electrons by location, relative charge, relative mass.

• Use symbols: A=mass number, Z=atomic number

• Use notation for writing isotope symbols: ²³⁵₉₂U or U-235

• Identify isotope using mass number and atomic number and relate to number of protons, neutrons, and electrons.

• Differentiate average atomic mass of an element from the actual isotopic mass and mass number of specific isotopes.