1.3 - Discovery of Subatomic Particles
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Practice Questions
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Who discovered the electron?
💡 Hint: Think of the experiment with cathode rays.
What charge do protons have?
💡 Hint: Remember, they are found in the nucleus.
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Interactive Quizzes
Quick quizzes to reinforce your learning
Who discovered the neutron?
💡 Hint: Remember, he revealed the missing mass in the nucleus.
Protons reside in which part of the atom?
💡 Hint: Consider what makes up the atomic nucleus.
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Challenge Problems
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Discuss how the discovery of the electron challenged the existing theory of matter in the 19th century and what implications this had for modern physics.
💡 Hint: Consider how the inclusion of subatomic particles changes the understanding of elements.
If an atom contains 6 protons, 6 neutrons, and 6 electrons, identify the element and discuss its isotopes.
💡 Hint: Remember that isotopes have the same number of protons but different neutrons.
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