JJ Thompson hypothesized that atoms consist of smaller particles. Through experiments with electric currents in near-vacuum tubes, he observed light emission and deflection of rays by magnetic fields, leading to the discovery of electrons. Thompson proposed the plum pudding model, suggesting atoms are made of positively charged material with embedded electrons. Concurrently, Becarel and the Curies explored radiation, discovering energy emission from certain elements.

What did JJ Thompson observe when an electric current was passed through a tube?

• The tube changed color.

• The tube emitted light.

• The tube emitted sound.

• The tube vibrated.

What conclusion did Thompson draw from the deflection of rays by a magnetic field?

• The rays were made of negatively charged particles.

• The rays were made of neutral particles.

• The rays were made of positively charged particles.

• The rays were unaffected by magnetic fields.

What is the name given to the negatively charged particles discovered by Thompson?

• Electrons

• Photons

• Neutrons

• Protons

In Thompson's atomic model, how are electrons arranged?

• Electrons are fixed in a lattice structure.

• Electrons are located only on the surface.

• Electrons are scattered within a positively charged material.

• Electrons orbit the nucleus.

Which scientists were exploring radiation around the same time as Thompson's work?

• Henry Becarel, Pierre Curie, and Marie Curie

• Isaac Newton and Galileo Galilei

• Albert Einstein and Niels Bohr

• James Clerk Maxwell and Michael Faraday