Anatomy & Physiology › Section B · The chemical level › Topic B.1
Elements and atoms
Bone, blood and brain are all built from the same few dozen kinds of atom. Knowing what an atom contains, and how its electrons are arranged, explains why some elements are essential to life, why some isotopes are useful in medicine, and why atoms bond at all.
In this topic
- Matter and elements
- The elements of the body
- Inside the atom
- Atomic number and mass number
- Worked example: counting particles
- Isotopes and radioisotopes
- Worked example: a half-life
- Electron shells and the octet rule
- Worked example: predicting behaviour
- Common mistakes to avoid
- Key takeaways
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