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Group 18 (Noble Gas Family) Properties Video Lecture - JEE
FAQs on Group 18 (Noble Gas Family) Properties Video Lecture - JEE
| 1. What are the properties of the Noble Gas Family? |  |
Ans. The Noble Gas Family, also known as Group 18 on the periodic table, consists of the elements helium, neon, argon, krypton, xenon, and radon. These elements are characterized by their full outer electron shells, making them highly stable and unreactive. They are colorless, odorless, and tasteless gases at room temperature and have low boiling and melting points. Additionally, they have low densities and are poor conductors of heat and electricity.
| 2. Why are noble gases considered unreactive? | |
Ans. Noble gases are considered unreactive due to their stable electron configurations. They have full outer electron shells, meaning they have achieved the maximum number of electrons in their valence shells. This stability makes it difficult for noble gases to gain or lose electrons and form chemical bonds with other elements. As a result, they rarely participate in chemical reactions, making them highly unreactive.
| 3. What is the significance of noble gases in lighting? | |
Ans. Noble gases are commonly used in lighting due to their unique properties. When an electrical current is passed through a tube filled with noble gases, they emit characteristic colors of light. For example, neon produces a red-orange glow, while argon emits a blue-violet color. This phenomenon is utilized in neon signs, fluorescent lamps, and other types of gas discharge lamps, providing bright and colorful illumination.
| 4. How are noble gases used in cryogenics? | |
Ans. Noble gases, particularly helium, are widely used in cryogenics. Cryogenics is the branch of physics that deals with the production and behavior of extremely low temperatures. Helium, with its extremely low boiling point, is used as a coolant in various cryogenic applications, such as superconducting magnets, MRI machines, and particle accelerators. It is also used to create and maintain low-temperature environments for scientific research and industrial processes.
| 5. What are the health risks associated with noble gases? | |
Ans. While noble gases are generally considered safe and non-toxic, some of them can pose health risks in certain situations. For example, radon, which is a radioactive noble gas, can be harmful when it accumulates in enclosed spaces, such as basements, as it can increase the risk of lung cancer. Additionally, inhaling high concentrations of any noble gas, including helium or argon, can displace oxygen in the air and lead to asphyxiation. Therefore, proper ventilation and safety precautions should be taken when working with or in proximity to noble gases.
Text Transcript from Video
hello friends this video and keep top
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group 18 elements group 18 elements are
called noble gas earlier they are also
called inner gas but now they are not
called inner gas because not all the gas
in this among all the elements in this
group are inert we will study about this
so this group 18 elements they are
called noble gas and the elements are
helium neon argon Krypton xenon and
Ragan now if you see the name the way it
came to helium
word came from Helios and that his son
neon word came from Greek word Neos that
is that the meaning of that word is new
argon came from Greek word called argos
that means lazy Krypton came from a grip
word called kryptos that means hidden
xenon came from a Greek word xenon that
means stranger and radon comes from a
Greek word radius means reefs and it is
a radioactive this is the only real
active element in this now since all the
elements in this group of gas they are
also called a noble gas please note this
is the only group where all the elements
are gas and so we use this term noble
gas okay they also called earlier zero
group but now it is not consider group
earlier it is called it was called zero
group but now it is called noble gas
group in all these are gas and the
valence valence orbital in all these
elements is completely filled and that's
why they are noble they are not that
much reactive okay
they are noble they are not that much
reactive okay
now as I told they were our da called
inert gas but now they are not caught in
a gas because actually xenon reacts
xenon react with fluorine to form xef4
xvf 6x - in fact it also react with
oxygen to form XP o f4 we'll study about
these things so since one of the element
in this group reacts Utley so this inert
gas name is no longer used for this
group they are called noble gas that
means they are not that much reactive
they also called rare gas why because
all these gas are rare we will talk
about this in the occurrence okay so the
the common name is noble gas and the
elements are helium neon argon Krypton
xenon Rodman Rodman is the radioactive
element say known as keep it reactive it
reacts with fluorine oxygen to forms
some four pounds but the other ones are
not that reactor okay and they also got
real gas early early record inert gas
but now they are not corn inert gas
let's see the occurrence of these group
eating elements actually we are grouping
elements there's a noble gas family so
all these noble gas except dragon
accepted random all these other one
please they exist in atmosphere they
exist not atmosphere and if you talk
about the abundance atmospheric evidence
in the dry air is almost 1 percent for
all these gas not all these gas
individually the combined value I'm
talking about so in the atmospheric dry
condition these gas constitute almost 1
percent by volume this is one person
by a volume in dry air and out of these
this argon is the major constituent this
organism means it concentrate okay this
helium and neon they're also found and
radioactive minerals like pitch blends
more azide
these are also formed in the radioactive
minerals but most of these are found
generally in the atmosphere actually the
main source of Hylian if you talk about
the means of the film the main source of
helium is natural gas natural gas is the
main source of him the xenon and that
and these two are actually rare they are
the rarest element of this group okay
this rodham as I told this is a
radioactive element this is obtained as
a decay product so I have our a it was
my radium from this the case to get my
and it also gives more helium and please
note that though helium is not that much
abandoned in our earth but if we talk
about the universe in the universe we
have lot of helium in fact Sun has huge
never huge amount of helium if you talk
about the universe then the helium is
the second most abundant element 23
percent is helium in the universe and 76
percent is actually hydrogen
we talked about earth we have a good
amount of nitrogen but if you talk about
the universe universe as huge amount of
helium and huge amount of hydrogen and
helium is the second most abundant
element in this universe thank you visit
exam fee a.com to watch more videos a
time free online test
get free study materials find two
thousand mentors and much more
thanks on the game
r56 is brought to you by exam fear calm
no more fear from exam now let's study
group 18 elements group 18 elements are
called noble gas earlier they are also
called inner gas but now they are not
called inner gas because not all the gas
in this among all the elements in this
group are inert we will study about this
so this group 18 elements they are
called noble gas and the elements are
helium neon argon Krypton xenon and
Ragan now if you see the name the way it
came to helium
word came from Helios and that his son
neon word came from Greek word Neos that
is that the meaning of that word is new
argon came from Greek word called argos
that means lazy Krypton came from a grip
word called kryptos that means hidden
xenon came from a Greek word xenon that
means stranger and radon comes from a
Greek word radius means reefs and it is
a radioactive this is the only real
active element in this now since all the
elements in this group of gas they are
also called a noble gas please note this
is the only group where all the elements
are gas and so we use this term noble
gas okay they also called earlier zero
group but now it is not consider group
earlier it is called it was called zero
group but now it is called noble gas
group in all these are gas and the
valence valence orbital in all these
elements is completely filled and that's
why they are noble they are not that
much reactive okay
they are noble they are not that much
reactive okay
now as I told they were our da called
inert gas but now they are not caught in
a gas because actually xenon reacts
xenon react with fluorine to form xef4
xvf 6x - in fact it also react with
oxygen to form XP o f4 we'll study about
these things so since one of the element
in this group reacts Utley so this inert
gas name is no longer used for this
group they are called noble gas that
means they are not that much reactive
they also called rare gas why because
all these gas are rare we will talk
about this in the occurrence okay so the
the common name is noble gas and the
elements are helium neon argon Krypton
xenon Rodman Rodman is the radioactive
element say known as keep it reactive it
reacts with fluorine oxygen to forms
some four pounds but the other ones are
not that reactor okay and they also got
real gas early early record inert gas
but now they are not corn inert gas
let's see the occurrence of these group
eating elements actually we are grouping
elements there's a noble gas family so
all these noble gas except dragon
accepted random all these other one
please they exist in atmosphere they
exist not atmosphere and if you talk
about the abundance atmospheric evidence
in the dry air is almost 1 percent for
all these gas not all these gas
individually the combined value I'm
talking about so in the atmospheric dry
condition these gas constitute almost 1
percent by volume this is one person
by a volume in dry air and out of these
this argon is the major constituent this
organism means it concentrate okay this
helium and neon they're also found and
radioactive minerals like pitch blends
more azide
these are also formed in the radioactive
minerals but most of these are found
generally in the atmosphere actually the
main source of Hylian if you talk about
the means of the film the main source of
helium is natural gas natural gas is the
main source of him the xenon and that
and these two are actually rare they are
the rarest element of this group okay
this rodham as I told this is a
radioactive element this is obtained as
a decay product so I have our a it was
my radium from this the case to get my
and it also gives more helium and please
note that though helium is not that much
abandoned in our earth but if we talk
about the universe in the universe we
have lot of helium in fact Sun has huge
never huge amount of helium if you talk
about the universe then the helium is
the second most abundant element 23
percent is helium in the universe and 76
percent is actually hydrogen
we talked about earth we have a good
amount of nitrogen but if you talk about
the universe universe as huge amount of
helium and huge amount of hydrogen and
helium is the second most abundant
element in this universe thank you visit
exam fee a.com to watch more videos a
time free online test
get free study materials find two
thousand mentors and much more
thanks on the game
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Nov 06, 2024 Last updated |
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