State reactants and products by either photosynthesis OR cellular respiration (you do not have to do both!) Be sure to specify the reactants
and the products. For example: The reactants of
and the products are
are

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

When the mercury level in a barometer decreases that atmospheric pressure has

Use the periodic table to classify each of the elements below. cadmium (cd): vanadium (v): xenon (xe): iodine (i): potassium (k): strontium (sr):