Chapter 7
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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Wavelength
distance between two consecutive peaks or troughs in a wave
Symbol for wavelength
λ
Frequency
number of waves that pass a given point per second
Energy is _______ and can occur only in discrete units of size called _______
quantized, hv
discrete units of size
hv
quantum
the smallest amount of energy
electrons can be viewed as a stream of “particles” called?
photons
phenomenon in which electrons are emitted from the surface of a metal when light strikes it
photoelectric effect
when are electrons emitted from the surface of a metal?
when light strikes it
when electromagnetic radiation exhibits wave properties and particulate properties is a phenomenon called?
dual nature of light
diffraction
when light is scattered from a regular array of points or lines
diffraction pattern
bright spots and dark areas on a photographic plate
when does a diffraction pattern occur?
scattered light interfere constructively to produce a bright area or destructively to produce a dark area.
interfere constructively
the peaks and troughs are in phase
interfere destructively
the peaks and troughs are out of phase
continuous spectrum results when?
white light is passed through a prism.
the energy of the electron is?
quantized
quantized
to subdivide energy into very small but measurable increments
what is significant of the line spectrum of hydrogen?
indicates only certain energies are allowed for the electron
what is the quantum model?
the electron in a hydrogen atom moves around the nucleus only in certain allowed circular orbitals
A hydrogen atom in its lowest possible energy state is called?
ground state
the electron bound to the nucleus is similar to?
standing wave
orbital
a specific wave function
Heisenberg uncertainty principle
there is a limitation to just how precisely we know the position and momentum of a particle at any time.