4. Bond length between two bonded atoms is a. twice the diameter of the molecular orbital.
b. the separation at which their potential energy is minimum.
c. the separation at which the motion of each atom stops.
d. the sum of the diameters of each of the two overlapping electron
clouds.

Why is it important for scientists to review and repeat the work of other scientists? 1.a scientific theory must be tested three times before it is proven. 2.the scientific method only applies to repeated experiments. 3.an experiment may have had errors that the scientists didn't recognize. 4.the results of individual scientists may be influenced by bias. 5.an experiment must be performed twice before the data can be analyzed.