If your studying cells and heredity you are most likely taking a chemistry class

18. use the activity series to predict whether the following synthesis reaction will occur. write the chemical equations for the reaction if it's predicted to occur. (s) + o2(g) -> *note: it is possible.*

There are main groups in the modern periodic table of elements

Select the correct location on the image identify the element that humans need to breathe. 2015 er r ights reserved