Lewis Symbols and Octet Rule Video Lecture - JEE

hello friends this video on chemical
morning part 4 is what you buy exam fear
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this video please make sure that you
have watched part 1 - Part 3 so it says
that the formation of molecules only the
outer shell electron takes part in the
chemical reaction as a tone the latest
approach of chemical bonding the way
Levis explains the way the latest theory
explains the chemical bonding is it
assumes that in the formation of
chemical bond or chemical combination
only the outer shell electrons take part
and they are called valence electron the
inertial electron are well protected and
they do not take part in the process so
we can ignore those inertial electrons
and that's why if you see that a lithium
and sodium has the same level symbol
amine same number of electrons the
symbol because both has one outermost
electron but the electronic conviction
of lithium and sodium is different right
if you see the lithium is atomic number
is three atomic in relation is two one
sodium is eleven it is to eight all
right but both have same number of
outermost electrons so the symbol looks
similar for sodium and Ethan because the
Lewis approach has bothered only about
the valence electron the outer shell
electron so this guy levels the
Americans chemistry introduced the
simple notation to represent the valence
electron atom and these notation are
called level symbol or Lewis dot
structure the way it works is you just
write the name of the atom for example
carbon and carbon has how many are what
is the carbon atomic number six
electronic and we humans to four so the
outermost shell has four electrons so
you just write four electrons here like
this say me for boron if you see
so if you see boron boron has atomic
number below five so at UM a
congregation is tweekly outermost
electron has three electrons so you
write this boron and put three electrons
like this you can put three electrons
anywhere like this also you can put own
you can put like this one doesn't matter
just you have to put three electrons
surrounding Dora and that's all very
correct so the way it works is you just
write the name of the compound find the
electronic configuration find the
valence electrons and just write the
number of dots each dot represents one
valence electron correct so the number
of dots and on the symbol represents
number of valence left you can take more
examples as a resemble aluminum if you
take has atomic number 30
right there ignoring in addition to a
three right see a lady if you continue
to get light 1s2 2s2 2p6 3s2 sleepy this
guy is a outermost electron 3 right al
al maryam and put three electrons three
guards that's all is aluminum correct if
you want oxygen so let us say oxygen
oxygen atomic number is 6 1s2 2s2 Ruby
so actually a number is 8 to be for the
outermost electron is valence shell is
this number two it has six electrons so
right oh and for six electrons you can
also write it like this both are same
actually it so the trick here is why the
electronic and relation find the
electron right the symbol of the atom
and surround this with the number of
valence electron each dot represents of
others sorry
this rule got octet told octet rule
devised by Alevis and according to this
rule he is telling that he proposed that
the atoms either by transfer of electron
as I told in case of ionic bond or by
sharing of electron in case of covalent
bond they either transfer electron or
share see electrons just to achieve this
cocktail because octet is a stable
configuration this rule is called
optical alright I have explained for
example sodium chloride sodium flight
the limbs or socialize any one dot why
sodium has one electron in the outermost
cell chlorine has seven so it will be
seven dots or seven cross does matter so
sodium can easily lose one electron to
get stable chlorine readily accepts one
electron to get stable so this becomes
any class stable cl- civil and both are
attracted by the static force this is
NaCl and thus sodium a including the -
to form sodium chloride this is the case
of transfer of electron for sharing of
electron example I he was Korean touring
so chlorine has this chlorine has I
suppose seven electrons this guy is also
seven a light in this form dot huh so
nobody is willing to give because if you
have both this chlorine wants to get
electron they share this electron then
share this licked on this way I will
assume that this has these eat electrons
and this chlorine will assume that this
guy has this electron is shared right so
both assume that they have got eight
electrons are both a stable and they'll
form CL
this is what octave will say is that so
let's start
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