Related Questions

Which of the following elements has three valence electrons?
A Al
B Ag
C Au
D Ca
How may valence electrons does a silicon atom have?
A 0
B 1
C 2
D 4
E None of the above
The impurity atoms is semiconductors
A Inject more charge carriers
B Reduce the energy gap
C Increase the kinetic energy of valence electrons
D All of the above
The impurity atoms with which silicon should be doped to make p-type semiconductors are
A Phosphorus
B Antimony
C Boron
D Germanium
A semiconductor has generally ___________ valence electrons.
A 2
B 3
C 6
D 4
A pentavalent impurity has ___________ Valence electrons
A 3
B 5
C 4
D 6
In a metal, the valence electrons
A Are not shared
B Are shared only between neighbouring atoms
C Are shared by all atoms
D Either B or C
A trivalent impurity has valence electrons
A 4
B 5
C 6
D 3
When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as
A Isomers
B Isotopes
C Isobars
D Isotones
Rahim has invited his three buddies over to watch the basketball game on his wide-screen television. They are all hungry, but no one wants to leave to get food. Just as they are arguing about who should make the food run, a commercial comes on for a local pizzeria that delivers. The phone number flashes on the screen briefly and they all try to remember it. By the time Zachary grabs a pen and paper, each of them recollects a different number.i. All of the men agree that the first three numbers are 995.ii. Three of them agree that the fourth number is 9.iii. Three agree that the fifth number is 2.iv. Three agree that the sixth number is 6; three others agree that the seventh number is also 6.Which of the numbers is most likely the telephone number of the pizzeria?
A 995-9266
B 995-9336
C 995-9268
D 995-8266

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