What is shown by Thomson's experiments of electric discharge through gases ? And explain the plum pudding model.
What is shown by Thomson's experiments of electric discharge through gases ? And explain the plum pudding model.
These experiments showed the atoms of various elements contain negatively charged constituents (electrons).
They are identical for all atoms.
All atoms are electrically neutral even though they have negatively charged constituents.
Therefore, an atom must also contain some positive charge to neutralise the negative charge of the electrons. To understand this, Thomson understood the atomic model called Plum Pudding Model of the atom.
According to this model, the positive charge of the atom is uniformly distributed throughout the volume of the atom.
In this model the negatively charged electrons are embended in it like seeds in a watermelon. This called plum pudding model of the atom.
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- [IIT 2012]