MTL 200 - Midterm 1
1) calculator mode - correct answer-degrees
1) CP1. atoms/gram - correct answer-atoms/mol divided by g/mol
g/mol= from PT
atoms/mol = Avogadro's number
1) CP1. grams/atom - correct answer-g/mol divided by atoms/mol
g/mol= from PT
atoms/mol = Avogadro's number
1) CP2. wt% to atomic% - correct answer-- assume 100g (wt% becomes g)sample-->
calculate mol for each element (n=m/M)
- calculate total moles
- calc atomic % = mol/total mol * 100%
- total = 100%
1) CP3. Finding simplest chemical formula integers - correct answer-- wt% --> atomic %
- atomic %--> decimal
- note: x/y order = calculate ratio
- simplest ratio integers = x and y unknowns
1) CP4. Find J and eV given lambda in nm - correct answer-E=hc/lambda, --> convert nm to
m
convert J to eV (divide J by J/eV)
1) CP5. electron configuration - correct answer-- 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
- 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?
1) electronegativity - correct answer-ability to attract e, become negatively charged
increase left to right, and bottom to top (F = most electronegative)
, 1) Energy Transition - correct answer-E=hv=hc/lambda
1) materials classification - correct answer-metals
ceramics
polymers
composites
semiconductors
Biomaterials
1) materials engineering - correct answer-use of fundamental and applied knowledge:
of materials that can be "converted" into products necessary or desired by society
1) materials science - correct answer-search for basic knowledge:
internal structures
properties
processing of materials
1) materials structure - correct answer-structure depends on arrangement of internal
components (sub, micro, macro)
1) molar calc's - correct answer-
1) net force - correct answer-Fn= Fa+Fr
(magnitude of force = function of interatomic distance)
1) photon energy - correct answer-electromagnetic radiation
1) Primary bonding - correct answer-ionic
covalent
metallic
(coulombic, shared, sea of valence e's)
1) Quantum model - correct answer-size, shape, spatial orientation of e's probability density
1) quantum numbers - correct answer-(n) principle QN = # of atomic shells in Bohr model
(l) subsidiary QN = s,p,d,f--> # of subs hell in main energy level
(ml) = magnetic QN = spatial orientation
(ms) = e spin QN = 2 allowed spin directions
1) secondary bonding - correct answer-van der Waals
hyrdogen
(electric dimples, dipole moments, electrostatic forces)
1) strong to weak forces - correct answer-ionic-covalent-metallic-van der waals-hydrogen
1) structures - correct answer-1. subatomic (atomic)
1) calculator mode - correct answer-degrees
1) CP1. atoms/gram - correct answer-atoms/mol divided by g/mol
g/mol= from PT
atoms/mol = Avogadro's number
1) CP1. grams/atom - correct answer-g/mol divided by atoms/mol
g/mol= from PT
atoms/mol = Avogadro's number
1) CP2. wt% to atomic% - correct answer-- assume 100g (wt% becomes g)sample-->
calculate mol for each element (n=m/M)
- calculate total moles
- calc atomic % = mol/total mol * 100%
- total = 100%
1) CP3. Finding simplest chemical formula integers - correct answer-- wt% --> atomic %
- atomic %--> decimal
- note: x/y order = calculate ratio
- simplest ratio integers = x and y unknowns
1) CP4. Find J and eV given lambda in nm - correct answer-E=hc/lambda, --> convert nm to
m
convert J to eV (divide J by J/eV)
1) CP5. electron configuration - correct answer-- 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
- 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?
1) electronegativity - correct answer-ability to attract e, become negatively charged
increase left to right, and bottom to top (F = most electronegative)
, 1) Energy Transition - correct answer-E=hv=hc/lambda
1) materials classification - correct answer-metals
ceramics
polymers
composites
semiconductors
Biomaterials
1) materials engineering - correct answer-use of fundamental and applied knowledge:
of materials that can be "converted" into products necessary or desired by society
1) materials science - correct answer-search for basic knowledge:
internal structures
properties
processing of materials
1) materials structure - correct answer-structure depends on arrangement of internal
components (sub, micro, macro)
1) molar calc's - correct answer-
1) net force - correct answer-Fn= Fa+Fr
(magnitude of force = function of interatomic distance)
1) photon energy - correct answer-electromagnetic radiation
1) Primary bonding - correct answer-ionic
covalent
metallic
(coulombic, shared, sea of valence e's)
1) Quantum model - correct answer-size, shape, spatial orientation of e's probability density
1) quantum numbers - correct answer-(n) principle QN = # of atomic shells in Bohr model
(l) subsidiary QN = s,p,d,f--> # of subs hell in main energy level
(ml) = magnetic QN = spatial orientation
(ms) = e spin QN = 2 allowed spin directions
1) secondary bonding - correct answer-van der Waals
hyrdogen
(electric dimples, dipole moments, electrostatic forces)
1) strong to weak forces - correct answer-ionic-covalent-metallic-van der waals-hydrogen
1) structures - correct answer-1. subatomic (atomic)
