JJ Thomson is known for developing which model in 1898?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Plum Pudding Model.
J.J. Thomson is renowned for developing the 'Plum Pudding Model' (also known as the 'Watermelon Model' or 'Thomson Atomic Model') in 1898.
This model proposed that the atom was a sphere of uniform positive charge with negatively charged electrons embedded within it, much like plums in a pudding or seeds in a watermelon.
Thomson formulated this theory based on his groundbreaking discovery of the electron in 1897, which revealed that atoms were divisible and contained subatomic particles.
Although later superseded by Ernest Rutherford's nuclear model (1911), Thomson's work was foundational in shifting atomic theory from a indivisible particle to a structured entity, paving the way for modern physics.