Identify the element in period 3 of the periodic table that reacts with oxygen to form an ionic compound represented by the formula x2o.

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?