Which statement best describes how atoms differ from molecules? O A. An atom can be broken down into smaller particles of matter.
B. An atom cannot be broken down into smaller particles of the
same or different substances.
OC. An atom cannot form chemical bonds with other homs of the
same element.
O D. An atom can consist of two or more molecules of different
elements.

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.