Periodic table trends

12 videos
Have you ever wondered why it is called the "periodic" table? The elements are organized based on their electronic structure, which results in some interesting trends in atomic properties as you move down a group or across a period. This tutorial will try to explain some of those trends!

Atomic radius trends on periodic table

VIDEO 9:40 minutes
How atomic radius is defined, and trends across a period and down a group.

Atomic and ionic radii

VIDEO 11:26 minutes
Explaining group and period trends in atomic and ionic radii.

Mini-video on ion size

VIDEO 3:04 minutes
Correcting a mistake and learning a bit about ion size

Ionization energy trends

VIDEO 10:02 minutes
Definition of ion and ionization energy, and trends in ionization energy across a period and down a group.

Group trend for ionization energy

VIDEO 10:19 minutes
Explaining trend in ionization energy down a group using concepts of nuclear charge, electron shielding, and distance of electrons from nucleus

Period trend for ionization energy

VIDEO 12:54 minutes
Explaining trends in ionization energy across a period using nuclear charge, shielding, and distance of electrons from nucleus

First and second ionization energy

VIDEO 7:35 minutes
Comparing first and second ionization energy of Li using nuclear charge, shielding, and distance of electrons from nucleus

Electron affinity

VIDEO 11:40 minutes
Definition of electron affinity, and comparing electron affinities of Li, Be, and B

Period trend for electron affinity

VIDEO 7:28 minutes
Explaining general trends in electron affinity across the second period, including the exceptions N and Ne

Electronegativity

VIDEO 9:54 minutes
Defines electronegativity and compares to electron affinity. Explains group and period trends in electronegativity using atomic radii.

Electronegativity and bonding

VIDEO 11:39 minutes
Electronegativity differences in bonding using Pauling scale. Using differences in electronegativity to classify bonds as covalent, polar covalent, or ionic.

Metallic nature

VIDEO 9:28 minutes
Properties of metals and how we can explain their properties using electron "sea" model.