How many valance electrons does a semiconductor have?

Answer 1

It is not the number of valence electrons that an insulator has that is important. It is the way the valence electrons are "arranged" in the structure of the material that matters. If not all the valence electrons of a substance are "involved" in the structure of the material, then these electrons are said to be free electrons. They move about in the substance, and are free to contribute to electron flow. The metals are examples. In contrast with this, if all the electrons are bound up in a material, they are not free to support current flow, and the material is said to be an insulator. Said another way, if the valence electrons in a material are in a Fermi energy level that overlaps the conduction band for that material, the material is a conductor. In an insulator, the valence electrons are all in Fermi energy levels that are below the conduction band for that material, and it is an insulator. Applying a voltage to an insulator will not "lift" the valence electrons up into the conduction band to allow them to support current flow.

Answer 2

The main material in the semiconductor has 4 valence electrons. If it is doped, the small amounts of impurities that are added have either 5 valence electrons (n-type semiconductor), or 3 valence electrons (p-type semiconductor).

The main material in the semiconductor has 4 valence electrons. If it is doped, the small amounts of impurities that are added have either 5 valence electrons (n-type semiconductor), or 3 valence electrons (p-type semiconductor).

The main material in the semiconductor has 4 valence electrons. If it is doped, the small amounts of impurities that are added have either 5 valence electrons (n-type semiconductor), or 3 valence electrons (p-type semiconductor).

The main material in the semiconductor has 4 valence electrons. If it is doped, the small amounts of impurities that are added have either 5 valence electrons (n-type semiconductor), or 3 valence electrons (p-type semiconductor).

Answer 3

The main material in the semiconductor has 4 valence electrons. If it is doped, the small amounts of impurities that are added have either 5 valence electrons (n-type semiconductor), or 3 valence electrons (p-type semiconductor).

Answer 4

Insulators usually have 3 or more valence electrons.

Conductors usually have 1 or 2 valence electrons.

Answer 5

The expression valence electrons is adequate for chemical elements.

Answer 6

it contain 7 or 8

Answer 7

5 or more tightly bound

Answer 8

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