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Discovery of the Electron (Thomson)

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eMusic Study Pack • Government
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📖 Comprehensive Note

J.J. Thomson's Discovery of the Electron (1897) marked a turning point in atomic physics. Using a cathode ray tube, Thomson demonstrated the existence of negatively charged particles within atoms — later called electrons.

  • Instrument Used: Cathode Ray Tube (CRT)
  • Discovery: Electrons — tiny negatively charged particles inside atoms.
  • Model: “Plum Pudding Model” — positive sphere with embedded electrons.
  • Significance: Proved atoms are divisible and contain internal structure.

🎤 Lyrics

Verse 1 In eighteen ninety-seven, in the lab so bright, Thomson worked both day and night. He used a cathode ray tube, you see, To find what’s inside the atom’s sea! Chorus: Thomson, Thomson, what did you see? In the glowing tube of mystery! Tiny sparks began to run — The electron! The very first one! Verse 2 He said, “Atoms aren’t solid balls at all, They’ve got tiny charges, small but tall.” A positive sphere, with electrons inside, Like plums in pudding, side by side! Chorus: Thomson, Thomson, what did you see? In the glowing tube of mystery!... Outro His model came before Bohr and Chad, But for his time, it wasn’t bad! He showed us atoms can divide — That electrons live inside! Chorus: Thomson, Thomson, what did you see? In the glowing tube of mystery! You changed the world, your work begun — The atom’s story had just begun!
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📊 Line-by-Line Study Guide

Lyric LineExplanation
In eighteen ninety-seven...Refers to the year J.J. Thomson discovered the electron.
Used a cathode ray tubeThe device through which electrons were first observed.
The electron! The very first one!Discovery of the first subatomic particle — the electron.
Positive sphere with electrons insideDescribes Thomson’s Plum Pudding Model of the atom.

❓ Quiz

1. What did J.J. Thomson discover?

2. What instrument did he use?

3. What was his atomic model called?

🃏 Flashcards

Q1: What particle did Thomson discover?
Electron
Q2: What year was the discovery made?
1897
Q3: What model of the atom did he propose?
Plum Pudding Model

🎯 Drag & Drop

Match the discovery with the correct scientist:

Discoveries
Scientists
Electron
Nucleus
Proton
Neutron