Models of the atom David Bailey 31/07/2019 © Class Leading Ltd.

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Presentation transcript:

Models of the atom David Bailey 31/07/2019 © Class Leading Ltd. Free for non-commercial educational use provided that this copyright notice is included.

Draw a sketch of what you think an atom looks like.

Here are some possible answers. Which of these is closest to your drawing? The dot and cross The circle The sphere The orbital The happy atom! The very small dot or nothing at all (because atoms are very small after all!)

? Models of the atom - Dalton ‘Particle’ model of atom. Can be used to explain… states of matter pressure JJ Thompson ‘Plum pudding’ model of atom. Can be used to explain… static electricity conduction of electricity Rutherford ‘Nuclear atom’ Can be used to explain… radioactivity high angle scattering of a Electron ring structure Can be used to explain… bonding (ionic and covalent) ionisation energies periodic trends in atomic properties emission spectra metallic conduction ? Nucleus Quarks

Remember Models are just that – they are models and they represent the atom. None of these models show what the atom actually looks like. Each model serves a particular purpose and it is okay to use a ‘good enough’ model