Use the Picture Below to Answer the Following Questions

Q120: The following pictures show the electron populations

Q121: Which substance is the best conductor of

Q122: According to band theory,which of the following

Q123: Look at the location of elements A,B,C,and

Q124: The number of electrons that half fill

Q126: How would one classify a silicon crystal

Q127: Which has been found to be a

Q128: Copper can be obtained from its copper(I)sulfide

Q129: How is slag separated from molten ore

Q130: Light emitting diodes (LEDs)used in automobile brake