A: Styrofoam does not decompose in the environment under normal circumstances. Much like plastic, Styrofoam is made from a polystyrene-based petroleum product that is not biodegradable. Plastic takes hundreds of years to decompose, and Styrofoam takes much longer because it is a stronger form of plastic.
View Full Document. Zone of wastage: Is the area in which melting or ablation rates exceed those of snowfall (Fig.2). â¢ The snow line: Is the boundary between the zone of accumulation and that of wastage, and could therefore be defined as the highest level at which winter snow melts in the summer. VI- Internal structure of a glacier.
Unformatted text preview: Zinc is in period 4 in the d-block. The highest occupied principal energy level is n=4. Boron is in period 2 in the p-block. The highest occupied principal energy level is n=2. GUIDE Exercise #20 7. Why are the gases in Group 18 called the noble gases? (How is this related to the occupation of the energy sublevels?) 8. Why do Group 1 metals lose only one electron when they are oxidized? Why do Group 2 metals lose two electrons? How is this related to the energy sublevels and orbitals? 9.