he could not explain the theory properly
An atomic model of Dalton doesn't exist; the model of Thomson was called plum pudding model.
The plum pudding model by JJ Thomson.
Thomson proposed an atomic model, now obsolete.
Chadwick discovered the neutron; he isn't the author of an atomic model.
Joseph John Thomson
Thomson discovered that the atom contained smaller particles called electrons
He discovered that the Atom is made of smaller particles called electrons.
He discovered that the Atom is made of smaller particles called electrons.
An atomic model of Dalton doesn't exist; the model of Thomson was called plum pudding model.
Thomson Atomic Model
I believe it is known as "Thomson's Model" or "Thomson's Atomic Model"
The plum pudding model by JJ Thomson.
Thomson proposed an atomic model, now obsolete.
His model cannot explain atomic spectra or radioactivity.
Thomson's Plum Pudding Model was introduced in 1904.
Chadwick discovered the neutron; he isn't the author of an atomic model.
His model cannot explain atomic spectra or radioactivity.