HELLO, PLEASE HELP ME

1. Nickel has a density of 8.902 g/mL and an atomic weight of 58.6934 g/mol. Given these data, what is the atomic radius of nickel (in A) if it follows an FCC crystal structure?

2. For BCC tungsten, compute (a) the interplanar spacing and (b) the diffraction angle for the (101) set of planes. The lattice parameter for W is 0.316 nm. Also, assume that monochromatic radiation having a wavelength of 0.1790 nm is used, and the order of reflection is 1.

3. The following are the most commonly used materials for actuators EXCEPT: a. shape-memory alloys b. piezoelectric ceramics c. photocatalytic nanomaterials

4. is a material trait in terms of the kind and magnitude of response to a specific imposed stimulus. a. property b. structure c. performance d. processing e. bonding

5. Which of the following does not pertain to a crystalline material? a. The atoms are situated in a repeating or periodic array over large atomic distances b. Long-range order exists c. Upon solidification, the atoms will position themselves in a repetitive three-dimensional pattern d. Each atom is bonded to its nearest-neighbor atoms e. Long-range atomic order is absent

6. These are a special type of grain boundary across which there is a specific mirror lattice symmetry; that is, atoms on one side of the boundary are located in mirror-image positions of the atoms on the other side. a. Angle-grain boundaries b. Tilt boundaries c. Phase boundaries d. Domain wall e. Twin boundaries

7. This is the boundary that separates regions having different directions of magnetization. a. Angle-grain boundaries b. Tilt boundaries c. Phase boundaries d. Domain wall e. Twin boundaries