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MSE 2034 > mG-1 > Flashcards

mG-1 Flashcards

1
Q

Which material has the highest density? What is the value?

A

Platinum, 20 g/cm^3

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2
Q

Which materials are insulators?

A

Polymers & ceramics

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3
Q

Which materials do well with cracks?

A

Metals

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4
Q

Provide the two classes of bonds with qualitative energies.

A

Primary 100,000kJ/mol , secondary 10,000kJ/mol

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5
Q

Provide the specific bonds of the two classes.

A

Primary - ionic, covalent, metallic

Secondary - Hydrogen bonding, dipole, van der waals

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6
Q

Which bonds are non-directional?

A

ionic & metallic

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7
Q

Which bonds are directional?

A

covalent & secondary

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8
Q

What is the MSE motto?

A

Processing, Structure, Properties, Performance

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9
Q

What is steel’s young’s modulus (stiffness)?

A

about 200 GPa

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10
Q

What are the types of properties in MSE?

A

mechanical, electrical, thermal, magnetic, optical, deteriorative

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11
Q

What does a deeper trough correspond with on the EvR graph?

A

higher melting point

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12
Q

What does a larger well width correspond with on the EvR graph?

A

larger coefficient of thermal expansion

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13
Q

What does the peak of the graph on the FvR correspond with?

A

ultimate strength

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14
Q

What does the slope of the FvR graph correspond with?

A

young’s modulus (stiffness)

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15
Q

What is the APF for Simple Cubic?

A

52%

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16
Q

What is the APF for Body Centered Cubic?

A

68%

17
Q

What is the APF for Face Centered Cubic?

A

74%

18
Q

What is the APF for Hexagonal Close-Packed?

A

74%

19
Q

How many atoms (n) in the Simple Cubic?

A

1

20
Q

How many atoms (n) in the Body Centered Cubic?

A

2

21
Q

How many atoms (n) in the Face Centered Cubic?

A

4

22
Q

How many atoms (n) in the Hexagonal Close-Packed?

A

6

23
Q

Side length of SC?

A

2r

24
Q

Side length of BCC?

A

4r/sqrt(3)

25
Q

Side length of FCC?

A

2sqrt(2)r

26
Q

Side length of HCP?

A

2r

27
Q

CN for SC?

A

6

28
Q

CN for BCC?

A

8

29
Q

CN for FCC?

A

12

30
Q

CN for HCP?

A

12

31
Q

What is an angstrom?

A

10^-10 m

32
Q

What is the equation for theoretical density?

A

p=nA/VN, n: number of atoms in cell, A: atomic weight, V: volume of cell, N: avogadro’s number, 6.022*10^23 atoms/mol

33
Q

What does atomic number mean?

A

The number of protons in the nucleus (determines the element)

34
Q

What does having a large electronegativity value mean?

A

tendancy to aquire electrons

35
Q

Explain the electronegativity trend of the periodic table.

A

It goes up and to the right (except for the noble gases)

36
Q

Explain metallic bonding

A

sea of electrons mixed into ion cores

37
Q

How do ceramics bond?

A

ionic and covalent

38
Q

How do metals bond?

A

metallic bonding

39
Q

How do polymers bond?

A

covalent and secondary

MSE 2034 (4 decks)

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