• True
• False
• #### 2.  Defined as the number of atoms per unit length whose centers lie on the direction vector for a specific crystallographic direction

• Linear Density (LD)
• Unit Cell Density (UCD)
• Planar Density (PD)
• #### 3.  The energy diagram of the d orbital energy splitting complexes in tetrahedral geometry, shows the d orbitals with higher in energy (t2g) which refer to _____________ d orbitals

• dz2
• dxy, dxz and dyz
• dz2 and dx2- y2
• dxy and dxz

• Orthorhombic
• Rhombohedral
• Tetragonal
• Cubic

• Monoclinic
• Triclinic
• Hexagonal
• None of this
• #### 6.  Long-range atomic order is absent

• Crystalline material
• Amorphous Material
• #### 7.  Defined as a line directed between two points, or a vector

• crystallographic direction
• crystallographic position
• crystallographic color
• crystallographic size

• Monoclinic
• Triclinic
• Hexagonal
• None of this
• #### 9.  The sum of the sphere volumes of all atoms within a unit cell (assuming the atomic hard-sphere model) divided by the unit cell volume

• Atomic packing factor (APF)
• Total unit cell volume
• Volume of atoms in a unit cell
• #### 10.  The energy diagram of the d orbital energy splitting complexes in octahedral geometry, shows the d orbitals with higher in energy (eg) which refer to _____________ d orbitals

• dz2
• dxy, dxz and dyz
• dz2 and dx2- y2
• dxy and dxz

• true
• false
• #### 12.  Taken as the number of atoms per unit area that are centered on a particular crystallographic plane

• Linear Density (LD)
• Unit Cell Density (UCD)
• Planar Density (PD)

• Polymorphism
• Allotropy
• #### 14.  Cube edge length a or x and the atomic radius R in FCC is related by

• a = 2R√𝟐
• a = 4R3\frac{4R}{\sqrt{3}}3​4R​
• #### 15.  When the ligands move along the x, y and z axes of d orbital in metal ion (octahedral geometry), they approach directly toward or between the lobes. Name the d orbitals that feel less repulsion?

• dz2 and dx2- y2
• dxy, dxz and dyz
• dz2
• dxy and dxz

• True
• False

• Lattice
• Amorphous
• Unit Cells
• FCC
• #### 18.  Crystallography

• science of measuring the crystal structure of a crystal
• science of combining crystals with another crystals
• science of determining the color of a crystal
• science of measuring the reactants of a crystal

• true
• false
• #### 20.  In order to compute the number of atoms per unit cell for the HCP crystal structure we will use

• N=Ni +Nf2+Nc6N=Ni\ +\frac{Nf}{2}+\frac{Nc}{6}N=Ni +2Nf​+6Nc​
• N=Ni +Nf2+Nc8N=Ni\ +\frac{Nf}{2}+\frac{Nc}{8}N=Ni +2Nf​+8Nc​
• #### 21.  Long-range order exists

• Crystalline material
• Amorphous Material
• #### 22.  The result when the periodic and repeated arrangement of atoms is perfect or extends throughout the entirety of the specimen without interruption

• single crystal
• polycrystalline
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