Astronomy Ch.6 (Atoms & Spectra) Crossword
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
                                                         
 
 
Down: 2) a spectrum in which there are no absorption or emission lines 3) a Doppler shift toward longer wave-lengths caused by a velocity of recession6) a Doppler shift toward shorter wavelengths caused by a velocity of approach 7) a temperature scale using Celsius degrees and based on zero at absolute zero8) a series of spectral lines produced by hydrogen in the near-ultraviolet and visible parts of the spectrum. the three longest-wavelength balmer lines are visible to the human eye10) the central core of an atom containing protons and neutrons that carries a net positive charge 12) radiation emitted by a hypothetical perfect radiator. the spectrum is continuous, and the wavelength of maximum emission depends on the body's temperature 14) a spectrum that contains absorption lines 16) the component of an object's velocity directed away from or toward Earth18) the application of physics to the study of astronomical objects and the entire universe 20) the theoretical lowest possible temperature at which a material contains no extractable heat energy. Zero on the Kelvin temperature scale 21) the electrostatic force of repulsion or attraction between charged bodies 24) an atomic particle with no charge and about the same mass as a proton25) a bright line in a spectrum caused by the emission of photons from atoms 27) a positively charged atomic particle contained in the nucleus of an atom. the nucleus of a hydrogen atom30) an atom that has lost or gained on or more electrons 31) two or more atoms bonded together Across: 1) the change in the wavelength of radiation due to relative radial motion of source and observer 4) the movement of an electron from one atomic energy level to another 5) low-mass atomic particle carrying a negative charge 9) a dark line in a spectrum caused by the absence of photons absorbed by atoms or molecules 11) one of a number of states an electron may occupy in an atom, depending on its binding energy 13) the wavelength at which a perfect radiator emits the maximum amount of energy. depends only on the object's temperature 15) spectral lines in the infrared spectrum of hydrogen produced by transitions whose lowest energy level is the third 17) a measure of the agitation among the atoms and molecules of a material; the intensity of heat19) the mathematical relation between the temperature of an ideal radiator (a blackbody) and the wavelength at which it radiates most intensely 22) one of the energy levels that an electron may occupy in an atom23) the mathematical relation between the temperature of a blackbody (an ideal radiator) and the amount of energy emitted per second from one square meter of its surface 26) the study of the behavior of atoms and atomic particles 28) a set of laws that describe the absorption and emission of light by matter 29) an atom in which an electron has moved from a lower to a higher energy level32) atoms that have the same number of protons but a different number of neutrons 33) the energy needed to pull an electron away from its atom34) Spectral lines in the ultraviolet spectrum of hydrogen produced by transitions whose lowest energy level is the ground state 35) the flow of energy from hot regions to cool regions 36) a spectrum containing emission lines 37) the lowest permitted electron energy level in an atom 38) refers to an atom that has lost or gained one or more electrons relative to its normal number, resulting in the atom having a net electrical charge
 

 

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