What was Becquerel studying when he discovered radioactivity?
radium
photography
phosphorescence and X-rays
unstable atomic nuclei

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

Which characteristic of water it form droplets? a. low specific heat b. nonpolar structure c. high surface tension d. ability to dissolve substances

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted