Oxygen (o) is a gas found in the 16th column of the periodic table. what statement is true about oxygen and he other elements in that column?

I'm pretty sure, all the elements in the column have similar chemical properties.

Hypothesis. why don’t you know this? i learned this stuff in like 5th grade

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.