MTL200 UPDATED ACTUAL Exam Questions and CORRECT Answers

MTL200 UPDATED ACTUAL Exam
Questions and CORRECT Answers
6 properties of a solid material - CORRECT ANSWER - 1)Mechanical
2)Electrical
3)Thermal
4)Magnetic
5)Optical
6)Deterioration (chemical reaction)


Classification of Metals (5 types) - CORRECT ANSWER - 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) - CORRECT ANSWER - 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) - CORRECT ANSWER - 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) - CORRECT ANSWER - 1)Come from 2 or more
types of material (metals, ceramics, polymers)
2)Designed to achieve multiple properties


Semiconductors - CORRECT ANSWER - Both an insulator and a conductor



Electrons in Atoms - CORRECT ANSWER - Electrons only have specific values of
energy, if energy levels change, electrons must make a quantum jump


How do electrons quantum jump? (2 points) - CORRECT ANSWER - 1)Either by
absorbing energy and moving up
2)Or by releasing energy and moving down


Quantum Numbers (4 parameters to describe e) - CORRECT ANSWER - 1)Size
2)Shape
3)Spatial orientation
4)Probability density


Principle Quantum Number 1 (shell letter, and sub-shell) - CORRECT ANSWER - Shell
letter K
Sub-shell S


Principle Quantum Number 2 (shell letter, and sub-shell) - CORRECT ANSWER - Shell
letter L
Sub-shell s,p

, Principle Quantum Number 3 (shell letter, and sub-shell) - CORRECT ANSWER - Shell
letter M
Sub-shell s,p,d


Principle Quantum Number 4 (shell letter, and sub-shell) - CORRECT ANSWER - Shell
letter N
Sub-shell s,p,d,f


Electron Spin Movement - CORRECT ANSWER - +1/2, -1/2



Ground State - CORRECT ANSWER - electrons occupy all the lowest energy states



Hydrogen ground state - CORRECT ANSWER - 1s^1



Helium - CORRECT ANSWER - 1s^2



Sodium - CORRECT ANSWER - 1s^2,2s^2,2p^6,3s^1



Electropositive - CORRECT ANSWER - elements capable of giving up electrons



Electronegative - CORRECT ANSWER - elements ready to accept electrons



Bonding Energy - CORRECT ANSWER - Eo=energy required to separate the atoms



The Primary Bond (3 types) - CORRECT ANSWER - 1)Ionic
2)Covalent
3)Metallic