Diode rectigies converts alternating
current (AC) to direct current (DC).
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The diode is made of two different parts. One part
is called p-type and
other part is called n-type.
In between, we call it the p-n junction. P--type is
silicon mixed with boron and n-type is silicon mixed
with phosphorous. In order to explain how it works,
we must know about the octet
rule and valence
electrons.
The octet rule is that bonded nonmetialic
atoms has eight electron outermost shell or energy
level. It means that when two chemicals react
each other and produce a product, its outer shell has
eight electrons.
The valence electrons are the electrons moving
aroung the most outer shell of an individual atom and
they are often involved into chemical reaction
bonding.
In the periodic table, we can see all the names of
elements and those are arranged into different
periods and coulmns which are arranged by its
chemical and physical characteristics. At the most
right coulmn, we can see very familiar names which
are helium, neon, argon, krypton, xenon, radon. We
call them the noble gases because they don't
chemically react with other chemicals. They have 8
valence electrons and without chemical reaction it
stisfies the octet rule. The chemical reaction occurs
because other elements want to have eight valence
electrons in their outer energy level. Sodium which
has 1 valence electron and chlorin which has 7
valence electrons can easily react each other. When
they become sodium chloride which is salt, it is very
stable because they have eight electrons in their
outer energy level and the octet rule is satisfied.
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