Question

Draw and label a model of an atom as proposed by Joseph John Thomson

Answer 1

Below is a simple hand-drawable representation (ASCII) of J. J. Thomson’s "plum‑pudding" model of the atom, with labels and a brief explanation.

.-----------------------------.
/ + + + + + + + + + + + + + \
/ + + - + + - + \
| + + + + + + + + + + |
| + - + + + - + + | ← Electrons (−) embedded in
| + + + + + + + + + + | a sphere of positive charge
\ + + - + + + + /
\ + + + + + + + + + + + + + /
'-----------------------------'

Labels:
- Large circle (shaded with + signs): uniform distribution of positive charge ("positive pudding" or "soup").
- Small minus signs (−): electrons (corpuscles) embedded in the positive material.
- Overall atom is electrically neutral (positive charge balances the sum of negative electrons).
- No central nucleus in this model.

Brief notes:
- Proposed by J. J. Thomson (around 1904), called the plum‑pudding model.
- Key idea: electrons are scattered like plums in a positively charged 'pudding'.
- Later superseded by Rutherford’s nuclear model after the gold‑foil experiment showed a concentrated central nucleus.