A dry cell changes 1.chemical 2.electrical 3.nuclear energy into A. heat B. electrical or C. magnetic energy

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

Which position represents spring in the southern hemisphere? a) b) c) d)

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?