Science Standard III, Chemistry
Lesson 311, Atomic Theory
Understanding the impact of Thomson’s and Rutherford’s atomic models
Describing the contribution of Robert Millikan: he measured the charge of an electron and an electron’s mass
Describing the contribution of Niels Bohr: each electron has a certain amount of energy and electrons orbit the nucleus in definite energy levels
Describing how the electron microscope works
Defining subatomic particles, proton, neutron, electron, atomic mass unit, atomic number, uncharged atom, ion, atomic mass, orbit, and isotope
Calculating an atom’s atomic mass
Describing electromagnetic force, the strong force, the weak force, and gravity
Understanding the concepts of repulsion and attraction
Understanding the process of radioactive decay