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Recap - Potassium Oxide

Part of the Atomic Structure section of Coddy's Chemistry journey. Lesson 43 of 45.

Challenge

Potassium oxide, K₂O, is a white solid. Farmers meet it on every bag of fertilizer: the potassium a fertilizer holds is given as the percent of K₂O it would make.

Most of the potassium and oxygen in K₂O is potassium-39 and oxygen-16. Build the two ions of potassium oxide from these isotopes: the potassium ion and the oxide ion.

Try it yourself

Atom builderBuild K+, O2−

All lessons in Atomic Structure

1Matter and Atoms

What Everything Is Made Of Elements, Compounds, Mixtures Chemical Symbols Counting Atoms in a Formula Recap - Molecule Kit

4Electron Arrangement

Shells and the First 20 Valence Electrons Ionization Energy as Evidence Light from Atoms Subshells: s, p, d Aufbau, Hund and Pauli Writing Configurations Ions and the Exceptions Recap - Configuration Race

7Practice Problems

Recap - Potassium OxideRecap - Helium from Rocks Recap - Uranium to Lead

2Models of the Atom

Dalton and Thomson Rutherford's Gold Foil The Nuclear Atom Bohr's Shells Recap - From Ball to Nucleus

5The Periodic Table

Mendeleev's Puzzle Groups and Periods Blocks: s, p, d, f Metals, Non-metals, Metalloids Alkali Metals Halogens Noble Gases Recap - Build the Table

3Inside the Atom

Protons Decide the Element Electrons and Charge Neutrons and Mass Number Nuclide Notation Ions Isotopes Radioactive Decay Relative Atomic Mass Recap - Mystery Particles

6Periodic Trends

Atomic Radius Ionic Radius Ionization Energy Trend Electronegativity Explaining Trends Recap - Mystery Element