MTL 200 EXAM 2025/2026 QUESTIONS
AND ANSWERS 100% PASS.
6 properties of a solid material - ANS 1)Mechanical
2)Electrical
3)Thermal
4)Magnetic
5)Optical
6)Deterioration (chemical reaction)
Classification of Metals (5 types) - ANS 1)Composed of at least 1 metallic element
2)Atoms arranged orderly
3)Relatively Dense
4)Relatively Stiff and Strong
5)Good conductors of heat and electricity
Classification of Ceramics (4 types) - ANS 1) Compounds between metallic and nonmetallic
elements
2) Commonly (oxides, nitrides, carbides)
3) Relatively stiff and strong
4)Very brittle (high susceptibility to fractures)
Classification of Polymers (6 types) - ANS 1)The family of plastic and rubbers
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,2)Large molecular structures
3)Can be ductile/pliable
4)Known to soften/decompose over time
5)Low electric conductivity
6)Nonmegnetic
Classification of Composites (2 types) - ANS 1)Come from 2 or more types of material
(metals, ceramics, polymers)
2)Designed to achieve multiple properties
Semiconductors - ANS Both an insulator and a conductor
Electrons in Atoms - ANS Electrons only have specific values of energy, if energy levels
change, electrons must make a quantum jump
How do electrons quantum jump? (2 points) - ANS 1)Either by absorbing energy and moving
up
2)Or by releasing energy and moving down
Quantum Numbers (4 parameters to describe e) - ANS 1)Size
2)Shape
3)Spatial orientation
4)Probability density
Principle Quantum Number 1 (shell letter, and sub-shell) - ANS Shell letter K
Sub-shell S
Principle Quantum Number 2 (shell letter, and sub-shell) - ANS Shell letter L
Sub-shell s,p
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, Principle Quantum Number 3 (shell letter, and sub-shell) - ANS Shell letter M
Sub-shell s,p,d
Principle Quantum Number 4 (shell letter, and sub-shell) - ANS Shell letter N
Sub-shell s,p,d,f
Electron Spin Movement - ANS +1/2, -1/2
Ground State - ANS electrons occupy all the lowest energy states
Hydrogen ground state - ANS 1s^1
Helium - ANS 1s^2
Sodium - ANS 1s^2,2s^2,2p^6,3s^1
Electropositive - ANS elements capable of giving up electrons
Electronegative - ANS elements ready to accept electrons
Bonding Energy - ANS Eo=energy required to separate the atoms
The Primary Bond (3 types) - ANS 1)Ionic
2)Covalent
3)Metallic
Ionic Bonding (3 points) - ANS 1)The transfer of electrons
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AND ANSWERS 100% PASS.
6 properties of a solid material - ANS 1)Mechanical
2)Electrical
3)Thermal
4)Magnetic
5)Optical
6)Deterioration (chemical reaction)
Classification of Metals (5 types) - ANS 1)Composed of at least 1 metallic element
2)Atoms arranged orderly
3)Relatively Dense
4)Relatively Stiff and Strong
5)Good conductors of heat and electricity
Classification of Ceramics (4 types) - ANS 1) Compounds between metallic and nonmetallic
elements
2) Commonly (oxides, nitrides, carbides)
3) Relatively stiff and strong
4)Very brittle (high susceptibility to fractures)
Classification of Polymers (6 types) - ANS 1)The family of plastic and rubbers
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,2)Large molecular structures
3)Can be ductile/pliable
4)Known to soften/decompose over time
5)Low electric conductivity
6)Nonmegnetic
Classification of Composites (2 types) - ANS 1)Come from 2 or more types of material
(metals, ceramics, polymers)
2)Designed to achieve multiple properties
Semiconductors - ANS Both an insulator and a conductor
Electrons in Atoms - ANS Electrons only have specific values of energy, if energy levels
change, electrons must make a quantum jump
How do electrons quantum jump? (2 points) - ANS 1)Either by absorbing energy and moving
up
2)Or by releasing energy and moving down
Quantum Numbers (4 parameters to describe e) - ANS 1)Size
2)Shape
3)Spatial orientation
4)Probability density
Principle Quantum Number 1 (shell letter, and sub-shell) - ANS Shell letter K
Sub-shell S
Principle Quantum Number 2 (shell letter, and sub-shell) - ANS Shell letter L
Sub-shell s,p
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, Principle Quantum Number 3 (shell letter, and sub-shell) - ANS Shell letter M
Sub-shell s,p,d
Principle Quantum Number 4 (shell letter, and sub-shell) - ANS Shell letter N
Sub-shell s,p,d,f
Electron Spin Movement - ANS +1/2, -1/2
Ground State - ANS electrons occupy all the lowest energy states
Hydrogen ground state - ANS 1s^1
Helium - ANS 1s^2
Sodium - ANS 1s^2,2s^2,2p^6,3s^1
Electropositive - ANS elements capable of giving up electrons
Electronegative - ANS elements ready to accept electrons
Bonding Energy - ANS Eo=energy required to separate the atoms
The Primary Bond (3 types) - ANS 1)Ionic
2)Covalent
3)Metallic
Ionic Bonding (3 points) - ANS 1)The transfer of electrons
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