EMA 3706 UCF Exam 1 Questions and Answers 100% Correct Graded A+ 2026/27
What are the 4 quantum numbers? - principal quantum number, angular momentum
quantum number, magnetic quantum number, and spin quantum number
Principal quantum number - Describes the energy level on which the orbital resides
n >or= 1
Angular momentum quantum number - Defines the shape of the orbital
0<n<1
Magnetic quantum number - Describes the 3D orientation of the orbital
-l<m<l
Spin quantum number - The quantum number that has only two possible values, +1/2 and
-1/2, which indicate the two fundamental spin states of an electron in an orbital
Pauli Exclusion Principle - An atomic orbital may describe at most two electrons, each
with opposite spin direction
Primary bonds - ionic bonds, covalent bonds, and metallic bonds
, Ionic bonds - Primary Bond, Non-Directional, Predominant for Ceramics,
Covalent bonds - Primary Bond, Directional, Predominant for Polymers, Similar
Electronegativity
% Ionic Character Formula - 1-e^((-(Xa-Xb)^2)/4) x 100%
secondary bonds - van der waals forces - Dispersion Forces, Dipole-Dipole, Hydrogen
bonding
Atomic Packing Factor - ((atoms/cell)x(Volume of a sphere))/(Volume of the unit cell)
unit cell - A crystal structure sub-divided into small repeat units
Unit cell represent the symmetry of the crystal structure
Materials are split into two types: - Crystalline and Noncrystalline/Amorphous
Simple Cube Structure - Low packing density, only occurs for Po
Face Centered Cubic (FCC) - Cubic Crystal with 1/2 an atom on each face, APF of 0.74
What are the 4 quantum numbers? - principal quantum number, angular momentum
quantum number, magnetic quantum number, and spin quantum number
Principal quantum number - Describes the energy level on which the orbital resides
n >or= 1
Angular momentum quantum number - Defines the shape of the orbital
0<n<1
Magnetic quantum number - Describes the 3D orientation of the orbital
-l<m<l
Spin quantum number - The quantum number that has only two possible values, +1/2 and
-1/2, which indicate the two fundamental spin states of an electron in an orbital
Pauli Exclusion Principle - An atomic orbital may describe at most two electrons, each
with opposite spin direction
Primary bonds - ionic bonds, covalent bonds, and metallic bonds
, Ionic bonds - Primary Bond, Non-Directional, Predominant for Ceramics,
Covalent bonds - Primary Bond, Directional, Predominant for Polymers, Similar
Electronegativity
% Ionic Character Formula - 1-e^((-(Xa-Xb)^2)/4) x 100%
secondary bonds - van der waals forces - Dispersion Forces, Dipole-Dipole, Hydrogen
bonding
Atomic Packing Factor - ((atoms/cell)x(Volume of a sphere))/(Volume of the unit cell)
unit cell - A crystal structure sub-divided into small repeat units
Unit cell represent the symmetry of the crystal structure
Materials are split into two types: - Crystalline and Noncrystalline/Amorphous
Simple Cube Structure - Low packing density, only occurs for Po
Face Centered Cubic (FCC) - Cubic Crystal with 1/2 an atom on each face, APF of 0.74
