Question

From his experiments, J. J. Thomson concluded that

Answer 1

The structure of Atoms contain electrons.

Step-by-step explanation:

Through his cathodic rays experiments he discovered the presence of electrons in atom's structure, that's why it's said that he's the discoverer of the electron. In 1906, he won Nobel Prize for his many jobs in physics.

Answer 2

He concluded that electrons are a component of the atoms of all elements.