Question

1. in the plum pudding model of the atom, where is most of the mass of the atom?

in the electrons
in the matter between the electrons
in the nucleus
in the protons

Explanation:

In the plum - pudding model, atoms were thought to be a uniform positive charge with electrons embedded in it. The matter between the electrons was considered to have most of the mass as it represented the positive - charged part of the atom. Protons and the concept of a nucleus were not part of the plum - pudding model. Electrons have very little mass compared to the rest of the atom in this model.

Answer:

in the matter between the electrons