Part of the Chemistry JourneyBetaJourneyAtomic Structure: Atoms, Electrons and the Periodic Table
Seven chapters and 45 lessons, from what everything is made of to the trends across the periodic table, ending with exam-style practice. Every challenge is built on a bench: assemble the atom, fill the shells and orbitals, place elements on the table, and each answer is checked.
45 lessons45 challenges180 quiz questions
- Beginner friendly
Hands-on interactive lessons
Quizzes to test your knowledge
Free certificate of completion
Syllabus
This section is part of the Chemistry Journey. The full syllabus has more sections: click any preview below to view it on the Journey page.
Section 1
Atomic Structure
Start sectionStartAtoms from zero: what matter is made of, how the model of the atom grew, protons, neutrons and electrons, isotopes, electrons in shells and orbitals, and the periodic table with its trends.Matter and Atoms
5 lessons920Models of the Atom
5 lessons920Inside the Atom
9 lessons1740Electron Arrangement
9 lessons1740The Periodic Table
8 lessons1535Periodic Trends
6 lessons1125Practice Problems
3 lessons3- Section 2Structure and Bonding49 lessons
- Section 3Stoichiometry41 lessons
- Section 4Oxidation and Reduction27 lessons
- Section 5Acids and Bases30 lessons
- Section 6Energy, Rates and Equilibrium35 lessons
- Section 7Food Chemistry and the Lab27 lessons
Learn by Building
Build atoms from protons, neutrons and electrons, fill shells and orbitals, and work on a live periodic table. Every Check names the exact mistake.
Build every atom from protons, neutrons and electrons, and read what the numbers on its symbol mean.
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Read, listen, test yourself, ask the AI about your own bench, or look up anything you've already covered. Every lesson meets you where you are.
Everything around you is matter, and all matter is made of tiny particles called atoms.
A substance made of only one kind of atom is an element. There are 118 known elements.
The periodic table lists every element with its symbol: H for hydrogen, O for oxygen.
Earn a Certificate
Earn a certificate when you complete a section. Add it to your LinkedIn profile to show how far your chemistry has come.
Certificate of CompletionChemistry Atomic Structure
Add to LinkedInWhy learn atomic structure with Coddy
- An atom you assemble. Drop in protons, neutrons and electrons; the element, mass number, charge and nuclide symbol update as you go.
- Configurations you fill in. Put electrons into shells or spin arrows into orbital boxes, and a Pauli, Hund or Aufbau slip is named on the spot.
- A periodic table you work with. Tap elements, order cards, place them from their configurations and paint the blocks and regions.
- Isotopes you can see. Place the peaks of a mass spectrum, then work out relative atomic mass in steps on a board.
Frequently asked questions about atomic structure
What does the atomic structure section cover?
Matter and atoms, chemical symbols and counting atoms in a formula, the models of the atom from Dalton to Bohr, protons, neutrons and electrons, nuclide notation, ions, isotopes, relative atomic mass and radioactive decay, electron configurations with shells and subshells, the periodic table and periodic trends: atomic and ionic radius, ionization energy and electronegativity. A final chapter of exam-style practice brings multiple choice, a multi-part question on ions and a question on a science article.
What is atomic structure?
How an atom is built: a tiny nucleus of protons and neutrons, with electrons arranged in shells around it. The number of protons decides the element, and the arrangement of the electrons decides how it behaves.
How do you write an electron configuration?
Fill the subshells in order of energy, 1s, 2s, 2p, 3s, 3p, 4s, 3d and on, with at most two electrons of opposite spin in each orbital, and one electron in each orbital of a subshell before any pair up. Sulfur, with 16 electrons, is 1s² 2s² 2p⁶ 3s² 3p⁴.
How long is the atomic structure section?
Seven chapters and 45 lessons, each a few minutes long. Finishing it earns a free, verifiable certificate.
What's the fastest way to learn Atomic Structure?
Write Atomic Structure every day. Coddy's course is structured exactly for that: short interactive lessons, immediate exercises, and AI hints when you stall. You spend more time coding Atomic Structure than waiting on long video lectures.
Do I get a Atomic Structure certificate when I finish?
Yes. When you complete the Atomic Structure course you receive a free certificate of completion that you can share on LinkedIn or add to your resume.
