NEET > Physical Chemistry for NEET > Discovery of Electrons
Discovery of Electrons Video Lecture - Physical Chemistry for NEET
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FAQs on Discovery of Electrons Video Lecture - Physical Chemistry for NEET
| 1. What is the discovery of electrons? |  |
Ans. The discovery of electrons refers to the scientific breakthrough made by J.J. Thomson in 1897, where he found evidence of small, negatively charged particles within atoms. This discovery revolutionized our understanding of atomic structure and laid the foundation for modern physics.
| 2. How was the discovery of electrons made? | |
Ans. J.J. Thomson conducted a series of experiments using cathode ray tubes to investigate the nature of electric currents. He observed that the rays produced in these tubes were attracted to positively charged plates and repelled by negatively charged plates, suggesting the presence of negatively charged particles. Through further experimentation, Thomson determined the ratio of charge to mass of these particles, thus identifying them as electrons.
| 3. Why is the discovery of electrons significant? | |
Ans. The discovery of electrons is significant because it provided experimental evidence for the existence of subatomic particles within atoms. It challenged the prevailing notion of atoms as indivisible, solid spheres and led to the development of the plum pudding model of the atom, which proposed that electrons were embedded within a positively charged sphere. This model ultimately led to the development of the modern atomic theory and our understanding of atomic structure.
| 4. How did the discovery of electrons contribute to technological advancements? | |
Ans. The discovery of electrons paved the way for numerous technological advancements. Understanding the behavior of electrons and their interaction with electric fields led to the development of electronic devices such as televisions, computers, and smartphones. It also formed the basis for the development of particle accelerators, which have been instrumental in scientific research and the discovery of other subatomic particles.
| 5. Are electrons the only subatomic particles discovered? | |
Ans. No, electrons are not the only subatomic particles discovered. Since the discovery of electrons, scientists have identified other subatomic particles, including protons and neutrons. Protons carry a positive charge, while neutrons have no charge. Together, electrons, protons, and neutrons form the building blocks of atoms. Additionally, further research has led to the discovery of other subatomic particles, such as quarks, leptons, and bosons, which have different properties and play crucial roles in the field of particle physics.
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