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ProfessorJ.J. Thomson is credited with identifying cathode rays as streams of negatively charged subatomic particles, which were later named electrons. His experiments with cathode ray tubes led to the discovery of the electron and contributed to the development of the atomic theory.
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Discuss what cathode rays and radioactivity reveal about the atom?
Cathode rays revealed the presence of negatively charged particles, later identified as electrons. This provided evidence for the existence of subatomic particles within the atom. Radioactivity demonstrated that atoms can decay and transform into different elements, challenging the idea that atoms are indivisible and leading to the development of nuclear theory.
What particles did jj Thomson discover?
J.J. Thomson discovered the electron in 1897 while conducting experiments with cathode rays. This discovery was groundbreaking as it provided evidence for the existence of subatomic particles.
Is cathode rays are material particles?
Cathode rays are streams of electrons that travel from the negatively charged cathode to the positively charged anode in a cathode ray tube. They are not material particles in the traditional sense because they do not have mass or volume, but rather behave as electron beams.
Who discovered the electron and how?
J.J. Thomson discovered the electron in 1897 through his experiments with cathode rays. He observed that these rays were made up of particles much smaller than the atom, leading to the identification of the electron as a fundamental constituent of all matter.
Why anode rays also known as canal rays?
Anode rays are also known as canal rays because they were discovered to be positively charged particles produced in a cathode tube when the cathode rays strike a gas at low pressure. The particles travel in the opposite direction of cathode rays and move towards the anode or positive electrode, hence the name "anode rays."
