Science Struck
Science Struck: Electronegativity Chart of Elements
Explains what electronegativity bonding is and presents a periodic table of elements that is color-coded to show electronegativity trends.
Other
University of Texas: Tabled Discussion
At this University of Texas site, atomic orbital occupancy, quantum numbers, the Aufbau Principle, and periodic trends are described in detail.
Wikimedia
Wikipedia: Electronegativity
This encyclopedia article from Wikipedia gives a definition for what electronegativity is, information on the two scales of electronegativity that are in common use (Pauling and Mulliken Scales), and a discussion on electronegativity...
Curated OER
Effective Nuclear Charge Periodic Trends
Acting as a subtopic of the General Chemistry Virtual Textbook's section on Atoms and the Periodic Table, this site discusses the properties of the atoms individually in relation to the main group elements of the Periodic Table.
Curated OER
Covalent Atomic Radii Periiodic Trends
Acting as a subtopic of the General Chemistry Virtual Textbook's section on Atoms and the Periodic Table, this site discusses the properties of the atoms individually in relation to the main group elements of the Periodic Table.
Curated OER
Ionic Radii Periiodic Trends
Acting as a subtopic of the General Chemistry Virtual Textbook's section on Atoms and the Periodic Table, this site discusses the properties of the atoms individually in relation to the main group elements of the Periodic Table.
Curated OER
Ionization Energies Periiodic Trends
Acting as a subtopic of the General Chemistry Virtual Textbook's section on Atoms and the Periodic Table, this site discusses the properties of the atoms individually in relation to the main group elements of the Periodic Table.
Curated OER
Electron Affinities Periiodic Trends
Acting as a subtopic of the General Chemistry Virtual Textbook's section on Atoms and the Periodic Table, this site discusses the properties of the atoms individually in relation to the main group elements of the Periodic Table.