Multiple Choice
How does the quantum mechanical model of the atom describe the paths of an atom's electrons?
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9. Quantum Mechanics
Introduction to Quantum Mechanics
Multiple Choice
Which of the following statements about the quantum-mechanical model is false?
A
Electrons in atoms are described by probability distributions called orbitals.
B
The quantum-mechanical model allows for precise prediction of both the position and momentum of an electron simultaneously.
C
Energy levels in atoms are quantized according to the quantum-mechanical model.
D
The quantum-mechanical model incorporates the wave-particle duality of electrons.
Verified step by step guidance1
Step 1: Understand the quantum-mechanical model of the atom, which describes electrons not as particles in fixed orbits but as wavefunctions that give probability distributions called orbitals.
Step 2: Recall the Heisenberg Uncertainty Principle, which states that it is impossible to simultaneously know both the exact position and exact momentum of an electron with perfect precision.
Step 3: Analyze each statement: the first statement about electrons being described by orbitals is true because orbitals represent probability distributions.
Step 4: The statement about energy levels being quantized is true because electrons can only occupy certain allowed energy states in an atom.
Step 5: The statement about the quantum-mechanical model incorporating wave-particle duality is true since electrons exhibit both wave-like and particle-like properties; therefore, the false statement is the one claiming precise simultaneous prediction of position and momentum.
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