Assertion: sulfur's compound | /r/HasProperty | electron distribution
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Source sentences:
text: It is useful to compare features of the compounds of sulfur (electron distribution 1s22s22p63s23p4) with those of oxygen, which lies directly above sulfur in the periodic table (electron distribution 1s22s22p4), and with those of the heavier member of the chalcogen family, selenium (electron distribution 1s22s22p63s23p64s23d104p4), which lies directly below sulfur.