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Recap - Mystery Particles

Part of the Atomic Structure section of Coddy's Chemistry journey. Lesson 19 of 45.

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Challenge

A lab has six mystery particles. Rebuild each one from its description:

  1. An oxygen atom with 10 neutrons that has gained two electrons.
  2. Chlorine-37 that has gained one electron.
  3. An aluminum particle with mass number 27 and 10 electrons.
  4. The carbon isotope used to date old bones: two more neutrons than carbon-12, and neutral.
  5. Hydrogen with one neutron and no charge.
  6. Calcium-40 after it has lost its two outer electrons.

Try it yourself

Atom builderBuild O2−, Cl−, Al3+, C, H, Ca2+

All lessons in Atomic Structure

1Matter and Atoms

What Everything Is Made OfElements, Compounds, MixturesChemical SymbolsCounting Atoms in a FormulaRecap - Molecule Kit

4Electron Arrangement

Shells and the First 20Valence ElectronsIonization Energy as EvidenceLight from AtomsSubshells: s, p, dAufbau, Hund and PauliWriting ConfigurationsIons and the ExceptionsRecap - Configuration Race

7Practice Problems

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

2Models of the Atom

Dalton and ThomsonRutherford's Gold FoilThe Nuclear AtomBohr's ShellsRecap - From Ball to Nucleus

5The Periodic Table

Mendeleev's PuzzleGroups and PeriodsBlocks: s, p, d, fMetals, Non-metals, MetalloidsAlkali MetalsHalogensNoble GasesRecap - Build the Table

3Inside the Atom

Protons Decide the ElementElectrons and ChargeNeutrons and Mass NumberNuclide NotationIonsIsotopesRadioactive DecayRelative Atomic MassRecap - Mystery Particles

6Periodic Trends

Atomic RadiusIonic RadiusIonization Energy TrendElectronegativityExplaining TrendsRecap - Mystery Element