Chemical formula - Molecular formula. 1  Molecular formulas indicate the simple numbers of each type of atom in a molecule of a molecular substance. 2  A molecular formula shows the number of elements in a molecule, and determines whether it is a binary compound, ternary compound, quaternary compound or has even more elements.
Fortunately, there is another resource available that allows you to get Hazard Perception Test practice in WA. They are online HPT practice tests provided by the South Australian version of the Department of Transport. The practice tests feature clips very similar to those in the real HPT.
Figure-Ground Perception. Figure-ground perception is the ability to focus on one specific piece of information in a busy background. Visual figure-ground is the ability to see an object in a busy background; while auditory figure-ground helps a child pick out a voice or sound from a noisy environment. This article deals with the visual perceptual skill and offers some activity ideas to inspire parents and teachers!