Chem 121 Flashcards
S orbital shape
Spherical
P orbital shape
Dumbbell
D orbital shape
Cloverleaf
F orbital shapes
Complex with many lobes
The photoelectric effect is
The ejection of electrons by a metal when struck with light of sufficient energy
According to Heisenberg Uncertainty Principle, it is impossible to simultaneously know precisely which two quantities?
Momentum and Position
Visible light
The product of wavelength and frequency is a constant for visible light in a vacuum
Who was the Austrian scientist who discovered that when electron occupy the same orbital, their spins must be paired?
Wolfgang Pauli
Bohr model
Electrons travels in a circular paths called orbits
Electron energies are quantized
What has the longest wavelength
Infrared
What radiation has the greatest energy
Ultraviolet
How do energy gaps between successive electron energy levels in an atom vary from low to high n values?
The energy gap decrease as n increases
Which characteristic of an atomic orbital most closest associated with the magnetic quantum numbe, Mi
Orientation
Who is the most important scientist that led to the idea of uncertainty between position and energy?
Werner Heisenberg
The uncertainty principle states that
It is impossible to know the exact position and momentum of an electron simultaneously
Which of the following is a statement of Hess’s law?
If a reaction is carried out in a series of steps, the H for the reaction will equal the sum of the enthalpy changes for the individual steps
Albert Einsteins explanations of the photoelectric effect confirmed which of the following concepts?
Light has both particle and wave properties
The contribution for which de Broglie is remembered in modern science is
His proposal that particles of matter should be associated with wavelike behavior
What is the maximum electron capacity for the fifth energy level?
50
Arrange the following spectral regions in order of increasing wavelength
Ultraviolet-Visible-infrared-microwave
Who is the most important scientist that led to the probabilistic interpretation of the square of the wave function?
Max Born
Which of the following quantum numbers described the shape of an orbital?
Orbital quantum number
Delta H fusion is
Solid to a liquid
Delta H vapor is
Liquid to a gas
