MTL 200 EXAM STUDY QUESTIONS
AND 100% CORRECT ANSWERS!!
What is the general trend on the periodic table for increasing the Electronegativity?
The electronegativity usually increases from left to right and bottom to top. [MC]
Ionic Bonding and Directonality
Chemical bonding that results from the electrical attraction between cations and anions.
Electron is given. Non-directional
Covalent Bonding and Directionality
Covalent Bonding happens when electrons are shared between two atoms and they have a
similar electronegativity.
Covalend Bonds are directional
Metallic Bonding and Directionality
In a metallic bond, the valence electrons are not bound to a particular electron and can flow
throughout the metal.
Metallic Bonds are non-directional.
Dipole
created by equal but opposite charges that are separated by a short distance
Fluctuating Induced Dipole Bonds
a fluctuating induced dipole bonds is a temporary bond due to some atomic vibrations or motion.
Polar Molecule Induced Dipole Bonds
A polar molecule induced bond happens when two polar molecules are attracted to their opposite
sides. [Water Molecule]
Hydrogen Bonds - Permanent Dipole Bonds
Hydrogen has some very strong bonds to other atoms such as Cl, F.
Crystalline Material
, One in which the atoms are situated in a repeating or periodic array over large atomic distances
Unit Cell
a basic structural unit of a crystal structure, defined in terms of geometry and atom
positions within a parallelepiped volume.
FCC Number of Atoms, Coordination Number and APF
4 atoms in Unit Cell
12 Coordination Number
APF is 0.74 or 74%
BCC Number of Atoms, Coordination Number and APF
2 atoms in Unit Cell
8 Coordination Number
APF is 0.68 or 68%
HCP Number of Atoms, Coordination Number and APF
6 atoms in Unit Cell
12 Coordination Number
APF is 0.74 or 74%
For BCC, the relation between the atomic radius and unit cell length
a=4R/sqrt(3)
For FCC, the relation between the atomic radius and unit cell length
a = 2Rsqrt(2)
Polymorphism
The phenomenon of a solid material to exist in more than one form of crystal structure.
Allotropy
Polymorphism but in Elements.
Linear Density Formula
AND 100% CORRECT ANSWERS!!
What is the general trend on the periodic table for increasing the Electronegativity?
The electronegativity usually increases from left to right and bottom to top. [MC]
Ionic Bonding and Directonality
Chemical bonding that results from the electrical attraction between cations and anions.
Electron is given. Non-directional
Covalent Bonding and Directionality
Covalent Bonding happens when electrons are shared between two atoms and they have a
similar electronegativity.
Covalend Bonds are directional
Metallic Bonding and Directionality
In a metallic bond, the valence electrons are not bound to a particular electron and can flow
throughout the metal.
Metallic Bonds are non-directional.
Dipole
created by equal but opposite charges that are separated by a short distance
Fluctuating Induced Dipole Bonds
a fluctuating induced dipole bonds is a temporary bond due to some atomic vibrations or motion.
Polar Molecule Induced Dipole Bonds
A polar molecule induced bond happens when two polar molecules are attracted to their opposite
sides. [Water Molecule]
Hydrogen Bonds - Permanent Dipole Bonds
Hydrogen has some very strong bonds to other atoms such as Cl, F.
Crystalline Material
, One in which the atoms are situated in a repeating or periodic array over large atomic distances
Unit Cell
a basic structural unit of a crystal structure, defined in terms of geometry and atom
positions within a parallelepiped volume.
FCC Number of Atoms, Coordination Number and APF
4 atoms in Unit Cell
12 Coordination Number
APF is 0.74 or 74%
BCC Number of Atoms, Coordination Number and APF
2 atoms in Unit Cell
8 Coordination Number
APF is 0.68 or 68%
HCP Number of Atoms, Coordination Number and APF
6 atoms in Unit Cell
12 Coordination Number
APF is 0.74 or 74%
For BCC, the relation between the atomic radius and unit cell length
a=4R/sqrt(3)
For FCC, the relation between the atomic radius and unit cell length
a = 2Rsqrt(2)
Polymorphism
The phenomenon of a solid material to exist in more than one form of crystal structure.
Allotropy
Polymorphism but in Elements.
Linear Density Formula
