Question

30. In Rutherford’s experiments, some of the _______________ aimed at gold atoms bounced back, suggesting that a solid mass was at the center of the atom.

Answer 1

should be 'alpha particles'

Answer 2

In Rutherford’s experiments, some of the ____Alpha particles____ aimed at gold atoms bounced back, suggesting that a solid mass was at the center of the atom.

Step-by-step explanation:

• In experiment, Rutherford used alpha particles which are nuclei of helium atom.
• So when these particles were bombard on the gold foil some of them were bounce back. Showing that some other nucleus in the foil repel them.