Question

question 12 (02 01r mc) which of the following observations indicates that an atom has neutrons? some uncharged particles are scattered by a beryllium atom when it hits a gold foil. some uncharged particles bounce back from a gold foil when it is bombarded with alpha particles. radiation with neutral particles is emitted when alpha particles strike beryllium atoms. radiation which attracts electrons is produced when a beryllium atom is bombarded with alpha particles.

Explanation:

Neutrons are neutral particles. When alpha - particles strike beryllium atoms and radiation with neutral particles is emitted, this is an indication related to the discovery of neutrons. The first two options about beryllium hitting gold foil or uncharged particles bouncing back from gold foil are not the key observations for neutrons. The fourth option about radiation attracting electrons is not related to the evidence of neutrons.

Answer:

Radiation with neutral particles is emitted when alpha particles strike beryllium atoms.