MTL 200 REVIEW BANK 2026 TRUSTED
ANSWERS GRADED A+
⫸ 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
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
,⫸ 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
2)The attraction bonding forces are coulombic (positive-negative
ions)
3)Nonderectional
⫸ Covalent bonding (3 points). Ans: 1)the share of electrons
2)directional
3)Non-metallic elements
⫸ Metallic Bonding (3 points). Ans: 1)Metals and alloys
2)electrons drift around through the solid
3)good at conducting heat and electricity
⫸ Secondary Bonds. Ans: Dipoles are the separation of a positive
with a negative charge
⫸ Induced Dipole Bonds (4 points). Ans: 1)weakest secondary bonds
2)spacial distribution changes forming a small induced dipole
between two atoms
ANSWERS GRADED A+
⫸ 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
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
,⫸ 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
2)The attraction bonding forces are coulombic (positive-negative
ions)
3)Nonderectional
⫸ Covalent bonding (3 points). Ans: 1)the share of electrons
2)directional
3)Non-metallic elements
⫸ Metallic Bonding (3 points). Ans: 1)Metals and alloys
2)electrons drift around through the solid
3)good at conducting heat and electricity
⫸ Secondary Bonds. Ans: Dipoles are the separation of a positive
with a negative charge
⫸ Induced Dipole Bonds (4 points). Ans: 1)weakest secondary bonds
2)spacial distribution changes forming a small induced dipole
between two atoms
