What did Thomas contribute to the model of the atom?

1. the electron

2. the nucleus

3. the neutron

4. the electron cloud

1. The electron!

The atom is composed of negatively charged electrons in a positive atom, embedded in it like raisins in a pudding (or pudding). By this comparison, it was that the assumption was called "Raisin Pudding Model." He presumed that the electrons were evenly distributed inside the atom, suspended in a cloud of positive charge. The atom was considered as a sphere with positive charge with electrons distributed as small granules. The main tool with which Thomson counted for his atomic model was electricity.

-good luck!

1. the electron

I'm pretty sure