1. What is the SI unit for measuring the amount of substance? A) Mole B) Kilogram C) Candela D) Ampere Correct Answer: A) Mole 2. Which of the following is not a fundamental SI unit? A) Kelvin B) Second C) Newton D) Meter Correct Answer: C) Newton 3. In the context of wave-particle duality, which particle was used by de Broglie to demonstrate wave-like properties? A) Electron B) Proton C) Neutron D) Photon Correct Answer: A) Electron 4. What is the uncertainty principle that states it is impossible to know simultaneously the exact position and momentum of a particle?

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