Flashcards
ch 5b (test II)
Cards in this deck (16)
- 1what is the structure of matter?proton: particle in nucleus
neutron: particle in nucleus
electron: particle in a "cloud" around the nucleus - 2difference between atomic number and atomic massnumber= # of protons in nucleus
mass= # of protons + # of neutrons - 3what defines the element?the number of protons
- 4what are the phase changes?ionization: stripping of electrons, changing atoms into plasma
dissociation: breaking of molecules into atoms
evaporation: breaking of flexible chemical bonds, changing liquid into gas
melting: breaking of rigid chemical bonds, changing solid into liquid - 5what does a phase of a substance depend on?both temp and pressure
- 6can electrons in atoms be in between energy levels?no
- 7what are the three basic types of spectra?emission
continuous
absorption - 8what are spectra of astrophysical objects usually made of?the three basic types of spectra
- 9—spectrum
- 10what spans all visible wavelengths without interruption?a common incandescent light bulb
- 11what emits light only at specific wavelengths and what does it depend on?a thin or low density cloud of gas will emit this light and it depends on its composition and temperature in order to produce a spectrum of bright emission lines
- 12how are absorption line spectrums made?they are made when a cloud of gas between us and a light bulb absorbs light at specific wavelengths
- 13chemical fingerprinteach type of atom has a unique set of energy levels
each transition corresponds to a unique photon energy, frequency, and wavelength - 14what produces a unique pattern of emission lines?downward transitions
- 15what kind of spectrum does an upward transition and why?they produce a pattern of absorption lines at the same wavelengths because they can absorb photons with the same energies
- 16—
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- Flashcards on ch 5b (test II), created by McKey McCrae on 12/10/2015.
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- McKey McCrae
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