S Block Elements (Part - 7) - Anomalous Lithium, Chemistry Video Lecture - Class 11

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are some anomalous properties only came
and that is mostly because the small
size of detainee discuss that analyst
property so these as I told they're
mostly per size small size of Elysium
item and the high charge to size ratio
charge stability shape so it has higher
polarizing power it can attract water
molecule so you can prove other stuffs
which other group one elements can do so
it has some different alimony property
and these are very property a clasp end
to pocket the first is the difference
from alkali metal and the similarly the
second is the similarity with magnesium
element that's what the dying girl thing
I am talking about so I have lithium
here I have magnesium here which is good
one at this is balloon right so they
have similar properties and they have
difference the lithium has different
property as compared to our tournament
so let's talk about the first thing that
is difference of behavior from
alkalinity so the first difference is
that lithium is much harder splitting
really hard has compared to other alkali
metals it has very very high melting in
punishment why because the size is so
small it forms very good Christians and
since the crystal is very high the
crystal enthalpy is very high it needs
huge energy to bring the crystal right
crystal is least reactive consider it is
very strong reducing agent I found that
when you burn the lithium in air it
forms a light wound and lithium nitrate
also example lithium nitrogen gives
lithium nitride so you Thea moi is a
nitrogen also other alkali metals they
don't call in nitrogen says lithium size
is very small he'll a class it attracts
water so when it is hydrated it forms
licl to h2o but other kilometers you
don't form hydrates so you theme is only
one that forms hydrates
lithium hydro gen cabined is not
obtained in the solid form but further
it is often because the lithium size is
small and s co 3 - the hydrogen
carbonate and it's big - a little
unstable right so it is not stable it
does not form in solid form but for
other ones since the other elements like
sodium potassium size it will bigger so
the other metal cabinets are
hydrocarbons are little stable
lithium they don't it doesn't form the
high-need or we actually did a great
thing
lithium we don't listen to mom he's
hiding but other alkali metals form
lithium my traits when reacted with
lithium oxide for the lithium nitrate
when heated gives lithium oxide for
other alkali metals they get the
corresponding nitrate I can write the
reaction for this let me write here so I
am eating ham my trade you heat this I
get in white to move and a little gas
and in balance is it one the balanced
reaction me this guy but other alkali
metals for example take sodium nitrate
you need this you get an even 2 plus in
balance this as an example gain
potassium nitrate you can lightweight so
you see there is a difference of the way
the lithium reacts gives oxide this
gives right right right
this lithium fluoride in lithium oxide
they are less solid in water why because
it's a covalent bond actually over in
bond with other bonds are generally
ionic bonds if you talk about sodium
potassium the jelly form ionic bond but
lithium nearly forms covalent bond so
they are less soluble in water and water
will alkali metals one more difference
issue already studied is
eeehm when reacts when efficient and
assume they are plenty of oxygen so
lithium and reacts with oxygen gives
lithium oxide always right but you see
other ordinary metals sodium potassium
they form their oxides or the home
superoxides this we have studied right
so lithium always warms oxides even if
you get more oxygen but sodium and
potassium their home super also getting
the other exact difference is the
lithium hydroxide is a VBS actually pays
but the other hydroxide will have a
sodium hydroxide version hydroxides they
are very very strong gates also one
difference the reaction with the carbon
lithium directly reacts with carbon to
form lithium combine but other alphabet
up don't react like later there are so
many difference that lithium has with
alkali metals now let's understand the
similarity within the lithium and
magnesium Bamm violation similarity wind
sorry so here is the size which is
almost same for lithium and my mission
that you have similar property so if you
see the similarity is Jenni because of a
similar size the first similarities you
see both are harder and lighter than
most of the elements in this perspective
fruitful sample you compare lithium with
- iam lithium is hardware and lighter
than potassium
similarly if you see magnesium calcium
magnesium ends harder and light light of
them calcium so that way they both are
lighter and hard when compared to other
elements in their respective groups they
would react slowly with potent right and
even if you heal to the ik stocks Aegean
they always form sorry their oxides and
hydroxides are less soluble and then
hydroxide is decomposed relative they
have simple property in this they both
form nitrites
when they directly react with nitrogen
and even if you heat lithium on a
machine with X and oxygen they always
form oxide they don't form superoxide
which other elements the the group form
and the covenants of lithium magnesium
they all easily decomposed why because
the different sized lithium and
magnesium are small and compared to the
big ion so the difference is between the
lithium in the carbonate is their
different size with the magnesium and
carbon it is there so lithium governs is
an - you carbon would already unstable
and would decompose on heating so
certain solid hydrogen governments are
not form again this is a size issue the
lithium of the magnesium are small and
today are not form for lithium and
magnesium hydrocarbons both a lithium
chloride and magnesium pride solvent is
not because the covalent characteristics
which they have got because the small
size and high charge degeneration and
both their hydrated form hydrates it
does all water why because both are
small and they have high charge
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