DefinePK

Description

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:atoms-elements-and-the-periodic-table/x2613d8165d88df5e:isotopes-and-ions/v/worked-example-calculating-ion-charge

Want to explore more? Check out the full Atoms, isotopes, and ions playlist here: https://youtube.com/playlist?list=PLSQl0a2vh4HBSf5CVmr7BQ-DAayIsE71N&si=n5y_agsm1Gc3CdM-

An atom with an electric charge is called an ion. The charge of an ion is equal to the number of protons minus the number of electrons.

Sections:
00:00 - Question: Charge of calcium ion with 18 electrons
00:27 - Using atomic number to find protons
00:49 - Calculating calcium ion charge
01:22 - Neutral calcium vs. calcium ion
01:43 - Example: Ion with 7 protons and 10 electrons
02:16 - Identifying the ion as nitrogen 3−

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