Chemistry Test 2-2 Word Scramble
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Question | Answer |
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 |
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