question

Electron diffraction is one physical observation that lead to the discovery of quantum mechanics

answer

true

question

Quantization of energy is an important observation for atomic and molecular scale systems

answer

true

question

Blackbody radiation cannot be explained by classical mechanics

answer

true

question

A wave function tells the amplitude of a wave function as a function of time but not position

answer

false

question

In quantum mechanics, physical observables each have a corresponding operator

answer

true

question

Whether quantum mechanics is necessary to describe a system is based on the degree to which allowed energy values form a continuous spectrum

answer

true

question

An operator always operates on the function to its left

answer

false: to its right

question

A group of functions labeled a complete set can be combined to describe any state

answer

true

question

The Schrodinger equation generates a family of wave functions that are orthogonal to each other

answer

true

question

Postulates are the foundation of a theory

answer

true

question

Operators always form an eigenfunction/eigenvalue relationship with the wave functions of the Schrodinger equation

answer

false

question

The particle in a box system has wavefunctions that are not continuous at the sides of the box

answer

false

question

Despite infinite potential energy outside, the particle of a box in a boxy system has a nonzero probability of being outside the box

answer

false

question

The probability of finding the particle in a particle in a box system does not depend on what part of the box you are looking at

answer

false

question

The particle in a box system can also be considered in 2 and 3 dimensions

answer

true

question

The energy levels of a particle in an infinite box are farther apart for a heavier particle

answer

false

question

Particles in a box with finite potential energy walls have no probability of being outside the box

answer

false

question

The higher in kinetic energy of a state, the less likely it will be in a classically forbidden area

answer

false

question

Reactions involving quantum mechanical tunneling have a higher probability for lighter atoms

answer

true

question

Boundary conditions, initial conditions and normalization are important in determining specific wave functions

answer

true

question

Odd functions satisfy the relationship: f(-x)=-f(x)

answer

true

question

the potential energy of the rigid rotor system has the form: kx^2/2

answer

false

question

Harmonic oscillator wave functions have a non-zero probability of being in classically forbidden region

answer

true

question

Rotational energy levels are further apart in energy than vibrational energy levels

answer

false

question

The distinct energy levels described by quantum mechanics make spectroscopy a good way to identify molecules

answer

true

question

Spectroscopy depends on interaction of oscillating electric fields from EM radiation and matter

answer

true

question

Spontaneous absorption of light moves a system to a higher energy state

answer

true

question

The harmonic oscillator model is best for describing low quantum number vibrational states

answer

true

question

Rotational spectroscopy is often used by organic chemists to identify functional groubs

answer

false: vibrational spectroscopy

question

The width of infrared absorptions is due to transitions occurring in rotational states within vibrational states

answer

true

question

The electrons around atoms are best described using quantum mechanics

answer

true

question

The principle quantum number of a hydrogen orbital can be determined by its shape (spherical, dumbell)

answer

false

question

The energy of the hydrogen atom wavefunctions depends primarily on the principle quantum number, n

answer

true

question

An orbital is defined as a multielectron wavefunction

answer

false: a single electron wavefunction

question

The electrons of the helium atom are described well by the hydrogen atom wave functions and changing the nuclear charge

answer

false

question

In the quantum mechanical treatment of atoms we assumed the nucleus was immobile (the nucleus does not move)

answer

true

question

Electron spin is a direct result of the Schrodinger equation

answer

false

question

Variational method is the most common approximation method to solve Schrodinger equation

answer

true

question

Matrices are used to represent wave functions and include electron spin

answer

True

question

Variational parameters are optimized when they maximize the energy of the trial wave function

answer

false: when they minimize the energy of the trial wavefunction

question

Molecular orbitals are more often written as a linear combination of atomic orbitals

answer

true

question

A basis set is a collection of wavefunctions used to approximate a wavefunction that cannot be solved for exactly

answer

true

question

The hartree-fock method provides a way to determine molecular orbitals without applying any approximation

answer

false

question

For every bonding orbital that is formed an antibonding orbital is formed

answer

true

question

Bonding orbitals have a higher energy than the atomic orbitals that combine to make the bonding orbital

answer

false

PHYSICAL CHEMISTRY: true/false – Flashcards

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