2.01 - Electron Dot Diagram - 4:18

Valence electrons

1.08 - Atoms vs. Ions - 9:34

KEY TERMS:
cation = positively charged atoms (metals)
anion = negatively charged atoms (non-metals)
metals lose electrons, non-metals gain electrons

1.07b - Anatomy of the Atom - 10:01

KEY TERMS: valence electrons, nucleus of the atom, orbitals, shells, protons, neutrons, atomic number, atomic mass (round off), electrons, periods (horizontal rows), groups (vertical columns), period number=#of orbitals, atomic number=# of protons and electrons for neutral atoms

1.07 - Anatomy of the Atom - 20:50

KEY TERMS: valence electrons, groups, periods, orbitals, shells, metals, non-metals
#of neutrons=atomic mass - atomic number
Group#=valence electrons
Period#=#of orbitals