Which element would be expected to have similar physical and chemical properties as oxygen, and why? nitrogen, because it's in the same period sulfur, because it's in the same group sulfur, because it's in the same period nitrogen, because it's in the same group

sulfur, because it's in the same group

Groups are columns of a periodic table. Both oxygen and sulfur are in the same group, and groups, such as halogens and noble gases, generally display similar properties. Periods are ordered by ascending atomic number, and don't typically display the same level of similarity. 

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