Question

what did thomson believe about the atom? they are positively charged particles randomly scattered in a negatively charged sphere they are negatively charged particles randomly scattered throughout a positively charged sphere

Explanation:

J.J. Thomson proposed the "plum - pudding" model of the atom. In this model, the atom is considered a positively charged sphere, and negatively charged electrons (particles) are randomly scattered throughout this positively charged sphere. The first option has the charge distribution reversed. So the correct description of Thomson's belief about the atom is the second option.

Answer:

the option with the text "they are negatively charged particles randomly scattered throughout a positively charged sphere" (the second option in the given choices)