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[Mental model] The Bohr model of the atom [Description] 
Unlike the previous example, which was primarily about prediction, this is a mental model primarily for chemical explanation. It is a picture of orbiting electrons imagined as moons around an 'earth' which represents the atomic nucleus of protons and neutrons. It can be extended to imagine more complex orbital patterns and rules for the number of electrons at each level. Limited predictions can then be made to imagine new elements and chemical bonds between atoms. This articulation does not mean that this is exactly how the mental model is formed in the mind, but the gravitational and geometrical parallels to actual atomic forces provide a visual and visceral way to know about atomic particles, although incomplete and a fiction! An externalised conceptual model in the form of a diagram (or animated film) can be drawn - this can become a shared articulation helping to develop and align each individual's mental model.
Theoretical & Conceptual Framework — English
Description