Which of the following is not true regarding rutherford's gold foil experiment?
- it effectively disproved the plum pudding model because most of the radiation went through.
- it confirms the existence of a dense nucleus and a mostly empty atom.
- the area around the nucleus must be of low mass.
- the scattering of the beta particles confirmed that the nucleus was positively charged.

The area around the nucleus must be of low mass.

Explanation:

Rutherford`s experiment showed that there are some positive charges in the center of the atoms, and because they are all together, they will give a great mass to the atom.

It was quite different from Thomson`s experiment, in which it was thought that the negative charges were mixed with the positive charges, around the atom (like a Pudding Model). In Rutherford`s experiment, because the direction of beta particles, it was the prediction of the positive nucleus.

Hope this info is useful.

a non redox reaction occurs when there is not a transfer of electrons. for redox reactions, which are reduction-oxidation reactions, a change in the oxidation number occurs. elements that are reduced gain electrons, and elements that are oxidized lose electrons.

explanation:

that tool would be a compass