explain sir j. j. Thomson atomic modal
Answers
At that time neutron is not discovered.
His model told that red part of watermelon is positive charge(proton) and seeds of watermelon is negetive charge(electron).
I hope you understand it.
Mark me as brainliest.
In The Thomson model, atoms were to have of negatively charged electrons. In those days , atoms were known to be neutrally charged.
To account for this, Thomson knew atoms must also have a source of positive charge to balance the negative charge of the electrons.
He considered three plausible models that would satisfy the known properties of atoms at the time:
A. Each negatively-charged electron was paired with a positively-charged particle that followed it everywhere within the atom.
B. Negatively-charged electrons orbited a central region of positive charge having the same magnitude as all the electrons.
C. The negative electrons occupied a region of space that itself was a uniform positive charge (often considered as a kind of "soup" or "cloud" of positive charge).
Thomson chose the third possibility ...
The atoms of the elements consist of a number of negatively electrified corpuscles enclosed in a sphere of uniform positive electrification, ...
Thomson based his atomic model on known experimental evidence of the day.
The orbits of electrons within the model were stabilized by the fact that when an electron moved away from the centre of the positively-charged sphere, it was subjected to a greater net positive inward force,
Electrons were free to rotate in rings which were further stabilized by interactions among the electrons, and spectroscopic measurements were meant to account for energy differences associated with different electron rings.
Thomson attempted unsuccessfully to reshape his model to account for some of the major spectral lines experimentally known for several elements.
The plum pudding model usefully guided his student e.g. Rutherford.
The colloquial nickname "plum pudding" was soon attributed to Thomson's model as the distribution of electrons within its positively-charged region of space reminded many scientists of "plums" in the common English dessert, plum pudding.