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Q & A: The Plum Pudding Model

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Most recent answer: 10/22/2007
I need a picture of the plumb pudding model and a little information on it.
- Zac Martin (age 16)
Zac -

The plum pudding model of the atom came before we understood that atoms had nuclei or even neutrons. At that point, all they knew was that atoms had a positively charged part and negatively charged parts. In this model, the positive part was like the 'pudding' - basically a round glob of positively charged stuff. The negative parts were the 'plums' - little points of negative charge scattered through the 'pudding.' Some people refer to the plum pudding model as the 'chocolate chip cookie model' for reasons that I think you can guess:

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(published on 10/22/2007)

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