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Chemistry Test 2-2


taking in of light by matter absorption
giving off of light by matter emission
light behaves as both __ and __ waves and particles
rhythmic disturbances that carry energy through matter or space wave
waves in which the medium moves at right angles to the direction the wave travels transverse waves
any material through which a wave can transfer energy medium
top of a wave crest
bottom of a wave trough
distance from crest to crest or trough to trough on a wave wavelength
distance from crest to or trough to the rest position of the medium amplitude
the number of waves that pass a given point in a second frequency
transverse waves produced by the motion of electrically charged particles that travel through space at the speed of light (also called light, radiation, EMR) electromagnetic waves
speed of light 3.00 x 10^8 m/s
list the EMR waves in order from shortest to longest gamma rays, x rays, uv rays, visible light, infrared, microwaves, radio waves
used in communications radio waves and microwaves
light given off by everything on earth infrared
used to treat skin disease, sterilize milk and water UV rays
earth's natural filter for UV rays ozone layer
used to see inside body x-rays
highest frequency; shortest wavelength; some frequencies used to treat cancer gamma rays
proposed that hot matter does not emit EMR continuously as would be expected if the light given off were in the form of waves Max Planck
the minimum amount of energy that can be lost or gained by an atom quantum
the emission of electrons from a metal when light of a certain frequency shines on it photoelectric effect
according to Einstein, certian kinds of light cannot eject elctrons from metals because____ the frequency of the light is too low
a particle of EMR having zero mass and carrying a quantum of energy photon
if energy goes up, then frequency goes up. this represent a ___ direct proportion
lowest energy state of an atom; most stable state of an atom ground state
state in which an atom has a higher energy statethan it has in the ground state excited state
when electrons absorb energy and move to higher energy levels, then move back down electron transition
a pattern of EMR spectra
tool used to study the structure of atoms and the composition of matter spectrascope
when one color blends into the next because all wavelengths of visible lioght within the range are being emitted continuous spectrum
each element has its own line emission spectrum that is like the element's fingerprints discontinuous spectrum
as matter gives off EMR, the EMR behaves like a ___ particle
Created by: lovecamille018