Question

multiple - choice question
why was jj thomsons model called the chocolate chip cookie model (or plum pudding model)?
he described it as spheres of negatively charged matter filled with positively charged electrons.
he described it as spheres of positively charged matter with negatively charged electrons.
he described it as spheres of negatively charged matter filled with positively charged protons.

Explanation:

JJ Thomson's model described the atom as a sphere of positively - charged matter with negatively - charged electrons embedded in it, similar to chocolate chips in a cookie or plums in a pudding.

Answer:

He described it as spheres of positively charged matter with negatively charged electrons.