Question

what could j. j. thomson conclude from his experiments? atoms are mostly empty space. most of the mass of the atom is concentrated in the center. atoms must balance positive and negative particles. atoms are indivisible.

Explanation:

J. J. Thomson's plum - pudding model proposed that atoms have a uniform positive charge with negatively - charged electrons embedded in it, indicating a balance of positive and negative particles.

Answer:

Atoms must balance positive and negative particles.