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GRE Chemistry Inorganic

Instructions:

Answer 26 questions in 15 minutes.
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Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. n-type conductivity
Excess electrons form a donor band close in energy to the conduction band
N=n; n+4; n+6
# of atoms of a ligand attached to a metal atom
Magnetic moment = v(n*(n+2))

2. Paramagnetism
Excess electrons form a donor band close in energy to the conduction band
4/sqrt(2) * r
(1.33x10^-13)* ³v(A)
Magnetic moment = v(n*(n+2))

3. Valence Band
An atom has been displaced to another site
Contain freely moving electrons
Role of Lewis base in coordination chemistry
Allows AC to be converted to DC

4. L.bcc
4/sqrt(3) * r
Forms ammonia from nitrogen
Fe(II)
Z

5. Extrinsic semiconductor
Insulator which is doped with other elements
Electron holes are formed by promotion of valence band electrons to the acceptor band
Determined by thermodynamics (Increased entropy)
4/sqrt(3) * r

6. Haber Process
More soluble
Conductivity increases with T
N=n; n+4; n+6
Forms ammonia from nitrogen

7. Conduction band
Unfully occupied orbital - potentially overlapping
Involved in biological methyl transfer
More soluble
4/sqrt(2) * r

8. Alkali metals
Forms ammonia from nitrogen
4/sqrt(2) * r
Recovered by electrolysis of molten salt
Contain freely moving electrons

9. Cobalamin
Electron holes are formed by promotion of valence band electrons to the acceptor band
(1.33x10^-13)* ³v(A)
Involved in biological methyl transfer
Excess electrons form a donor band close in energy to the conduction band

10. Extrinsic defect
4/sqrt(2) * r
Forms ammonia from nitrogen
Determined by synthetic conditions
Conductivity increases with T

11. Closo-; nido-; arachno- boranes
Conductivity increases with T
An atom has been displaced to another site
Fe(II)
N=n; n+4; n+6

12. Ligand / chelator
Determined by thermodynamics (Increased entropy)
Role of Lewis base in coordination chemistry
Involved in biological methyl transfer
(1.33x10^-13)* ³v(A)

13. Ferrous
Fe(II)
Magnetic moment = v(n*(n+2))
More soluble
# of atoms of a ligand attached to a metal atom

14. Transistor
Magnetic moment = v(n*(n+2))
Use low amount of current to regulate large amount
Z
4/sqrt(2) * r

15. Semiconductor
(1.33x10^-13)* ³v(A)
An atom has been displaced to another site
More soluble
Conductivity increases with T

16. Schottky defect
Recovered by electrolysis of molten salt
Insulator which is doped with other elements
An atom is missing from its usual site
Conductivity increases with T

17. Mass Number
Role of Lewis base in coordination chemistry
Determined by thermodynamics (Increased entropy)
Z
A

18. L.fcc
Unfully occupied orbital - potentially overlapping
Excess electrons form a donor band close in energy to the conduction band
4/sqrt(2) * r
Z

19. Atomic Number
Insulator which is doped with other elements
Conductivity increases with T
Involved in biological methyl transfer
Z

20. Intrinsic defect
4/sqrt(3) * r
Determined by thermodynamics (Increased entropy)
Involved in biological methyl transfer
Z

21. p-type conductivity
Contain freely moving electrons
A
Electron holes are formed by promotion of valence band electrons to the acceptor band
Use low amount of current to regulate large amount

22. Frenkel defect
An atom has been displaced to another site
Determined by thermodynamics (Increased entropy)
(1.33x10^-13)* ³v(A)
Fe(II)

23. Hapticity
Unfully occupied orbital - potentially overlapping
# of atoms of a ligand attached to a metal atom
Determined by synthetic conditions
Insulator which is doped with other elements

24. Larger difference in atomic radii
More soluble
Forms ammonia from nitrogen
Involved in biological methyl transfer
An atom has been displaced to another site

25. Nuclear Radius
Allows AC to be converted to DC
Excess electrons form a donor band close in energy to the conduction band
Electron holes are formed by promotion of valence band electrons to the acceptor band
(1.33x10^-13)* ³v(A)

26. p-n junction
N=n; n+4; n+6
# of atoms of a ligand attached to a metal atom
Use low amount of current to regulate large amount
Allows AC to be converted to DC