Chemistry, 28.10.2020 05:00 hdkdkdbx

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.
O A radiation with neutral particles is emitted when alpha particles strike beryllium atoms.
O A radiation which attracts electrons is produced when a beryllium atom is bombarded with alpha particles.

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Which of the following observations indicates that an atom has neutrons? Some uncharged particles a...