01 What did Ernest Rutherford's gold foil experiment demonstrate about an atom?
Each atom is composed of electrons and positive material,
The mass of the atom is evenly spread throughout the atom.
O Neutrons are located in the center of the atom.
O Positive charge occupies a very small volume in the atom.

The correct answer is -  Positive charge occupies a very small volume in the atom.

Explanation:

Ernest Rutherford's experiments exhibited the presence of the nuclear core: a small region with the greater part of the mass of the atom and the positive charge.  

Rutherford's gold foil analyze gave three conclusions:  

- the particle is generally vacant space  

- in it is a little, thick core  or dense nucleus

- the core is positively charged.

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.