Multiple Choice
Which of the following orbital-filling diagrams violates the Pauli exclusion principle?
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10. Periodic Properties of the Elements
The Electron Configuration
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Which of the following best describes cathode rays?
A
Particles of alpha radiation emitted from radioactive substances
B
Streams of electrons emitted from the cathode in a vacuum tube
C
Waves of electromagnetic radiation produced by heated metals
D
Beams of protons moving from the anode to the cathode
Verified step by step guidance1
Understand that cathode rays are related to experiments involving vacuum tubes and electric discharge.
Recall that cathode rays are streams of particles emitted from the cathode (negative electrode) when a high voltage is applied in a vacuum tube.
Recognize that these particles are electrons, which are negatively charged subatomic particles.
Eliminate options that describe alpha particles (which are helium nuclei), electromagnetic waves, or protons, as these do not match the characteristics of cathode rays.
Conclude that the best description of cathode rays is 'Streams of electrons emitted from the cathode in a vacuum tube.'
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