What did Thomson determine the charge of an electron to be positive or negative?

What did Thomson determine the charge of an electron to be positive or negative?

Thomson discovered the electron by experimenting with a Crookes, or cathode ray, tube. He demonstrated that cathode rays were negatively charged. The negative electrons represented the raisins in the pudding and the dough contained the positive charge.

What did JJ Thomson discover about the composition of atoms quizlet?

Thomson determined that all matter is made up of tiny particles that are much smaller than atoms. He called these particles ‘corpuscles,’ but now are called electrons. JJ Thomson helped with the discovery of electrons.

What feature of Rutherford’s gold who carried out the experiment foil experiment was most surprising to those?

Rutherford’s gold foil experiment showed that atoms are mostly empty space, with the positive charge concentrated in a nucleus. He realized this because most of the alpha particles passed straight through the piece of gold foil, with just a few deflected at huge angles.

What evidence did JJ Thomson provide about the structure of an atom?

J.J. Thomson’s experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson proposed the plum pudding model of the atom, which had negatively-charged electrons embedded within a positively-charged “soup.”

What did JJ Thomson discover *?

the electron
Joseph John “J. J.” Thomson. In 1897 Thomson discovered the electron and then went on to propose a model for the structure of the atom. His work also led to the invention of the mass spectrograph.

How did Thomson help our understanding of the atom quizlet?

Thomson discovered the electron by experimenting with a Crookes, or cathode ray, tube. He demonstrated that cathode rays were negatively charged. In addition, he also studied positively charged particles in neon gas.

What evidence does the foil experiment give for the centrally concentrated mass of an atom?

Rutherford concluded from his metal foil experiments that most of an atom is empty space with a tiny, dense, positively charged nucleus at the center that contains most of the mass of the atom. He also concluded that the electrons orbit the nucleus like the planets orbit the sun.

What evidence from Thomson’s experiment led him to conclude that the glowing beam contained negatively charged particles?

What evidence did Thomson have that his glowing beam contained negative particles? The beam was attracted to a positively charged plate and repelled by the negatively charged plate.