Science Scope and Sequence, Atomic Theory

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


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