Understanding the Plum Pudding Model and Electron Discovery

Who is credited with proving the existence of the electron?

• George Stony

• Ernest Rutherford

• JJ Thompson

• Albert Einstein

What was the primary tool used by JJ Thompson to demonstrate the existence of electrons?

• Mass spectrometer

• Cathode ray tube

• Oil drop apparatus

• Particle accelerator

What happens to cathode rays when a positive magnetic source is placed near them?

• They change color

• They disappear

• They are attracted

• They are repelled

What does the symbol 'e' represent in the context of cathode rays?

• Electricity

• Charge

• Energy

• Electron

Who conducted the oil drop experiment to determine the charge of the electron?

• JJ Thompson

• Robert Millikan

• Niels Bohr

• Ernest Rutherford

What was the significance of the oil drop experiment?

• It discovered the neutron

• It determined the exact charge of the electron

• It proved the existence of protons

• It measured the speed of light

How does the mass of an electron compare to that of a hydrogen ion?

• It is twice as large

• It is the same

• It is 1,836 times smaller

• It is 1,836 times larger

What analogy did JJ Thompson use to describe his model of the atom?

• Banana pudding

• Plum pudding

• Apple pie

• Chocolate cake

What is embedded within the positive mass in the Plum Pudding model?

• Photons

• Electrons

• Neutrons

• Protons

Why might JJ Thompson have chosen the term 'Plum Pudding' for his model?

• He was influenced by American culture

• It was a popular scientific term at the time

• He was British and it was a familiar dessert

• He wanted to honor a fellow scientist