Lab assist engr 45 properties | Engineering homework help

lab Assist Engr 45 properties FootIn this activitiy, we will be using the crystal visualization tool from Cal Poly located here (Links to an external site.) The simulation starts by default with the Simple cubic lattice screen. The drop-down menu allows you to view other lattice structures. You can rotate the structure and view it from different sides by holding the mouse and dragging the structure. You can also zoom in and out with the mouse wheel. There are two important modes that are controlled with the Expansion slider at the bottom of the screen. In Layering mode, you can see how the 3D crystal lattice can be made by stacking layers of atoms. In Unit Cell mode, you can see how the 3D lattice is composed of repeating unit cells with fractional atoms. How to turn in the lab Be sure to answer the questions in order and to number each question. If the question requires you to do a calculation, show all of your work Lattice Structures of Atomic Solids Use the crystal visualization tool (Links to an external site.) to answer the questions below Layering We will begin this activity by looking at the layering pattern of particles that gives rise to each of the cubic unit cells. A unit cell is the smallest unit in a repetitive pattern that makes the 3-dimensional lattice structure. As shown in Figure 1, there are two basic 2D patterns for layers of atoms. The atoms in each layer can be packed in a square array, or “close-packed” with a rhombus representing the simplest repeating pattern. When multiple layers of a particular 2D pattern are stacked together, they can generate a variety of 3D patterns, depending on how the layers are shifted relative to each other. If the layers repeat identically as they stack, this can be described as “AA” stacking. If the second layer is staggered relative to the first layer, but the third layer is stacked directly above the first layer, this stacking pattern is described as “ABA.” If the first, second, and third layers are all staggered relative to eachother (none are stacked directly above the other), this stacking pattern is described as "ABC". You can explore this layering effect by selecting Layering on the left of the visualization tool and using the Expansion slider. Figure 1. Square and rhombic unit cells in 2D layers. For each of the lattices (simple cubic, body-centered cubic, face-centered cubic, and HCP), answer the following questions. Use the visualization tool to help.