J. J. Thomson worked in the field of chemistry and proposed the atomic model theory after the discovery of the electron. He proposed the plum pudding model. Thus, option A is correct.
The plum pudding model of the atom was proposed by J.J. Thomson, after the discovery of electrons. The “plum pudding” atomic model was based on the plum cake structure where the sub-atomic particles were placed.
According to the model, the electrons being negative species were embedded as the cherries in the structure, while the protons being positive in charge were freely present in the rest of the pudding.
Therefore, Thomson proposed the “plum-pudding” atomic model.
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Answer:
the plum pudding model
Explanation:
The volume = 6.71 L
Charles's Law
When the gas pressure is kept constant, the gas volume is proportional to the temperature
V₁=7 L
T₁=25 °C(room temperature) + 273 = 298 K
T₂=12.5(halved) + 273 = 285.5 K
2)look up the chemical name and chemical formula of each acid and base