Sky News
London Eye being lit up for the Rio 2016 Olympics
London Eye being lit up for the Rio 2016 Olympics
AFP News Agency
CLEAN : Thailands army says martial law is temporary
CLEAN : Thailands army says martial law is temporary
Getty Images
Timelapse crowded people at orchard road in singapore
Timelapse crowded people at orchard road in singapore
Getty Images
Timelapse crowded people at orchard road in singapore
Timelapse crowded people at orchard road in singapore
Getty Images
Timelapse crowded people at orchard singapore
Timelapse crowded people at orchard singapore
Getty Images
Timelapse crowded people at orchard singapore
Timelapse crowded people at orchard singapore
Getty Images
4K Timelapse crowded people at orchard singapore
4K Timelapse crowded people at orchard singapore
Getty Images
HD Timelapse - Crowded people in orchard road at singapore
HD Timelapse - Crowded people in orchard road at singapore
Getty Images
HD Timelapse - Crowded people in orchard road at singapore
HD Timelapse - Crowded people in orchard road at singapore
Getty Images
HD Timelapse - Crowded people in orchard road at singapore
HD Timelapse - Crowded people in orchard road at singapore
Sky News
Tourists on the Beach at Tonsai Bay in Thailand
Tourists on the Beach at Tonsai Bay in Thailand
Khan Academy
Khan Academy: Ionization Energy Trends
Learn how cations and anions are formed by gaining or losing electrons. Ionization energy relates to the ability of an electron to leave or join an atom.
Khan Academy
Khan Academy: Chemistry: Periodic Table Trends: Ionization Energy
The energy to remove an electron, or ionization energy, is explained. [12:13]
Sophia Learning
Sophia: Formulas of Polyatomic Ions: Lesson 2
This lesson will define polyatomic ions and provide examples using Lewis structures. It is 2 of 2 in the series titled "Formulas of Polyatomic Ions."
Sophia Learning
Sophia: Naming Polyatomic Ions: Lesson 4
This lesson will explain that polyatomic ions have assigned names ending in -ate or -ite with a few exceptions, and discuss how ammonium is the only common polyatomic ion. It is 4 of 4 in the series titled "Naming Polyatomic Ions."
Khan Academy
Khan Academy: Lab Values and Concentrations: What Is an Equivalent?
A video lecture showing how to figure out how to calculate an equivalent and how it relates to a mole. Lecture takes the viewer through several calculations. [10:18]
Sophia Learning
Sophia: Electron Affinity
A brief introduction to the definition of electron affinity in an atom. [0:27]
Sophia Learning
Sophia: Solubility Rules
A narrated screencast which illustrates the solubility rules of common ions. This lesson provides examples on how to determine if an ionic compound will dissociate in water. [5:17]
Sophia Learning
Sophia: Trends in the Periodic Table
Through a series of video lectures and some review questions, learn about the Bohr model of the atom and the periodic table of elements. [7:51]
Sophia Learning
Sophia: Atoms
Watch this video lesson introducing the atom, and learn about its unique structure. [3:58]
Khan Academy
Khan Academy: Ionization Energy Trends
Definition of ion and ionization energy, and trends in ionization energy across a period and down a group. [10:01]