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MTL 200 Questions and Correct Answers/ Latest Update / Already Graded

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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) Page | 2 All rights reserved © 2025/ 2026 | 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 Page | 3 All rights reserved © 2025/ 2026 | 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 N

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MTL 200 Questions and Correct Answers/
Latest Update / Already Graded
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)


All rights reserved © 2025/ 2026 |

, Page |2


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



All rights reserved © 2025/ 2026 |

, Page |3


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



All rights reserved © 2025/ 2026 |

, Page |4



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



All rights reserved © 2025/ 2026 |

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