Describe the structure of Thomson's 'plum pudding' model of the atom. - Leaving Cert Chemistry - Question b - 2014
Question b
Describe the structure of Thomson's 'plum pudding' model of the atom.
Worked Solution & Example Answer:Describe the structure of Thomson's 'plum pudding' model of the atom. - Leaving Cert Chemistry - Question b - 2014
Step 1
Mass of positively-charged material
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Answer
The 'plum pudding' model proposes that the atom consists of a homogeneous sphere of positively-charged material. This positive charge is spread throughout the volume of the atom, providing an overall positive electric field.
Step 2
Electrons scattered in it
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Answer
Within this positively charged mass, small negatively charged particles, known as electrons, are scattered or embedded. These electrons are analogous to plums in a pudding, hence the name of the model.
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