Atoms

Structure, atomic & mass numbers, net charge

• Atoms - introduction: 4'40"

• Atomic number and mass number: 5'58"

• H, He, Li, Be, B: 2'47"

• C,N,O,F: 2'12": 2'12"

• Ne-Ca: 2'31"

• Basic atomic structure: A look inside the atom: 7'45"

• Atomic number, mass number, and net charge: 6'27"

• Practice problems: Net charge, mass number, atomic number: 4'57"

Isotopes

• What are isotopes?: 7'56"

• Isotopes and elements practice problems: 6'39"

• How to draw an energy level diagram of an atom 22'48"

• Electron configuration: 10'16"

• Introduction: 9'37"

• Atomic radius, ionization energy, electronegativity: 7'52"

• Valence electrons, periodic table and Lewis structure 16'52"

• Models of the atom timeline: 10'52"

• Discovery of the electron: 11'08"

• Discovery of the nucleus: 15'59"

• Charge of an electron: 12'53"

• Discovery of the neutron: 10'12"