Which event best becquerel determine uranium radiates rays?
(a) a cloudy day
(b) a substance glowing in the dark
(c) wrapping of ore in paper
(d) exposure of a photographic plate

Select the correct answer from each drop-down menu. to make a table of the elements, dmitri mendeleev sorted the elements according to their . he then split the list of elements into several columns so that elements beside each other had similar .