Physics, 29.07.2019 01:00 borgeschristoper694
When traveling from oxygen to sulfur to selenium, through this group in the periodic table, what is changing? a) the density of the elements decreases. b) the number of energy levels increases. c) the number of valence electrons of the elements decreases. d) the state of the element changes from gas to liquid to solid.
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When traveling from oxygen to sulfur to selenium, through this group in the periodic table, what is...
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