Exam (elaborations)
MTL 200 MIDTERM 1 QUESTIONS AND ANSWERS
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MTL 200 MIDTERM 1 QUESTIONS AND ANSWERS
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Terms in this set (70)
1) Energy Transition E=hv=hc/lambda
1. subatomic (atomic)
1) structures 2. Microscopic (materials)
3. Macroscopic (can be seen ex. building)
1) Quantum model size, shape, spatial orientation of e's probability density
ionic
covalent
1) Primary bonding metallic
(coulombic, shared, sea of valence e's)
van der Waals
hyrdogen
1) secondary bonding
(electric dimples, dipole moments, electrostatic forces)
ability to attract e, become negatively charged
1) electronegativity
increase left to right, and bottom to top (F = most electronegative)
1) strong to weak forces ionic-covalent-metallic-van der waals-hydrogen
metals
ceramics
polymers
1) materials classification
composites
semiconductors
Biomaterials
search for basic knowledge:
internal structures
1) materials science
properties
processing of materials
use of fundamental and applied knowledge:
1) materials engineering
of materials that can be "converted" into products necessary or desired by society
1) materials structure structure depends on arrangement of internal components (sub, micro, macro)
1) photon energy electromagnetic radiation
, (n) principle QN = # of atomic shells in Bohr model
(l) subsidiary QN = s,p,d,f--> # of subs hell in main energy level
1) quantum numbers
(ml) = magnetic QN = spatial orientation
(ms) = e spin QN = 2 allowed spin directions
Fn= Fa+Fr
1) net force
(magnitude of force = function of interatomic distance)
1) calculator mode degrees
g/mol divided by atoms/mol
1) CP1. grams/atom
g/mol= from PT
atoms/mol = Avogadro's number
atoms/mol divided by g/mol
1) CP1. atoms/gram g/mol= from PT
atoms/mol = Avogadro's number
- assume 100g (wt% becomes g)sample--> calculate mol for each element (n=m/M)
- calculate total moles
1) CP2. wt% to atomic%
- calc atomic % = mol/total mol * 100%
- total = 100%
1) molar calc's
- wt% --> atomic %
1) CP3. Finding simplest chemical formula - atomic %--> decimal
integers - note: x/y order = calculate ratio
- simplest ratio integers = x and y unknowns
E=hc/lambda, --> convert nm to m
1) CP4. Find J and eV given lambda in nm
convert J to eV (divide J by J/eV)
- make table (using original proton number)
- draw diagonal arrow
- fill from start of arrow to ending
- write e-config. in order of energy levels, 1,2,3,4,..
removing e:
- draw table with original proton number
1) CP5. electron configuration
- remove from outermost to inner
- write remaining e-config.
adding e:
- add e to original proton number
- draw table for new number
- filling order will account for the additional e's?
depend on arrangement of
3) physical properties
atoms, ions molecules
atoms/ions repeat in 3D pattern = solid
3) crystalline solid metals
alloys
ceramics
in crystalline solid:
groups of atom = repetitive pattern
3) unit cell
CUBE
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