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What is quantom number

Posted by Shreya Mishra 6 years, 4 months ago

CBSE > Class 11 > Chemistry

4 answers

Karan Kakati 6 years, 4 months ago

Chemistry chapter 2 atchece phar

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

It is address of the loction of electrons.

Yashvant Yadav 6 years, 4 months ago

Quantum number is a special number which gives the information about the particular electron which makes it different from all other electrons present in the same atom

Anshul Maurya 6 years, 4 months ago

Quatum numbers are actually the most accurate addresses of the electron in the atom.i.e, one electron in an element can have only one complete address. P.qn. tells the shell no./ Az.q.no. tells the subshell ( i.e, further division of shells) and msg.q.no. tells the orbital orientation or only orbital.The last q.no. definition is not cleary specified but we knew them as the direction of motion of electron in orbitaleither clockwise / anticlockeise.

ANSWER

What is Gay Lussac Law of gaseous volume

Posted by Amit Yadav 6 years, 4 months ago

CBSE > Class 11 > Chemistry

2 answers

Anup Lonare 6 years, 4 months ago

yogita is right

Yogita Ingle 6 years, 4 months ago

Gay-Lussac\'s Law of Combining Volumes:
When gases react, they do so in volumes which bear a simple ratio to one another, and to the volume of the gaseous product, provided that all the volumes are measured at the same temperature and pressure.
Example:
One volume of hydrogen when mixed with one volume of chlorine, gives two volumes of hydrogen chloride gas at the same temperature and pressure.
H₂ + Cl₂ → 2HCl
Thus the ratio 1:1:2 is simple.

ANSWER

please anybody send me the very short notes of the ch chemical bonding

Posted by Harsh Vardhan Maheshwari 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 6 years, 4 months ago

You can check revision notes here : https://mycbseguide.com/cbse-revision-notes.html

ANSWER

How much hard will be numericals from ch 2 and easy explanition of atomic spectra

Posted by Vikram Roy 6 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Write the hunds rule and Pauli exclusive rule

Posted by Brijesh Barua 6 years, 4 months ago

CBSE > Class 11 > Chemistry

2 answers

Mehak Gautam 6 years, 4 months ago

Hunds rule - Pairing of two electrons in the orbitals belonging to the same subshell does not take place until each orbital belongingt to that subshell has got one electron each. Pauli exclusive rule - Only two electrons may exist in the same subshell and these electrons must have opposite spin.

Abhilasha Rajput 6 years, 4 months ago

Hunds rule - In an equal energy orbitals we can't pair the unless and until each orbital is singally occupied Pauli's exclusive rule - an orbital can have maximum two electrons with opposite spin.

ANSWER

Difference between molality and molarity

Posted by Sakshi Anand 6 years, 4 months ago

CBSE > Class 11 > Chemistry

2 answers

Yogita Ingle 6 years, 4 months ago

Molality	Molarity
Mass of the solvent	Volume of the whole solution
Unit sign expressed as (m) <amp-mathml data-formula="\[\small \left (m \right )\]" inline="" layout="container"></amp-mathml>	Unit sign expressed as (M) <amp-mathml data-formula="\[\small \left ( M \right )\]" inline="" layout="container"></amp-mathml>
It has units of <nobr>moles/kg</nobr><amp-mathml data-formula="\[\small moles / kg\]" inline="" layout="container"></amp-mathml>	It has units of <nobr>moles/liter</nobr>

Amisha Aman 6 years, 4 months ago

Molarity- It can be defined as no of moles of solute per litre solution.Unit is mol/litre. Molality-It can be defined as no of moles of solute per kilogram of solvent.Unit is mol/kg.

ANSWER

Atomic spectra

Posted by Rakesh Sharma 6 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Hydrocarbons ka reaction

Posted by Mahesh Bhai 123456 6 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

61.02 how many significant figure

Posted by Sanjay Agrawal 6 years, 4 months ago

CBSE > Class 11 > Chemistry

9 answers

Aman Yadav 6 years, 4 months ago

Absolutely 4

Milan Rajput 6 years, 4 months ago

4

Akshay Sharma 6 years, 4 months ago

4

Tannu Sharma 6 years, 4 months ago

There are 4 significant figures

Harsh Mishra 6 years, 4 months ago

Yes, there're 4 significant figures you'n see the ncert too it's also given in it....????

#Aditi~ Angel???? 6 years, 4 months ago

4 than @diti?

Jheel Tippan 6 years, 4 months ago

It*

Jheel Tippan 6 years, 4 months ago

Ut has 4 significant figures as zero between non zero digits is also significant

Sanjay Agrawal 6 years, 4 months ago

4

ANSWER

Which type of questions come in exam from quantum number for 20 marks questions

Posted by Supriya Rajput 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

#Aditi~ Angel???? 6 years, 4 months ago

Supriya you can see in this app for ur question Thanks @diti

ANSWER

what is the difference between STP and NTP

Posted by Meenu Bhargava 6 years, 4 months ago

CBSE > Class 11 > Chemistry

5 answers

Anjali Kumari??? 6 years, 4 months ago

Harsh mishra u are from DAV?

Robinpreet Kaur 6 years, 4 months ago

Hi pratik

Pranav Punari 6 years, 4 months ago

STP is Standard Temperature and Pressure, where temperature is taken as 273K(0 C) and pressure is taken as 1 atm(1 atmosphere). Whereas NTP is Normal Temperature and Pressure, where temperature is taken as the normal room temperature(about 28-30 C) and pressure is taken as 1 atm.

Robinpreet Kaur 6 years, 4 months ago

Wow what a great answer these r the toppers HARSH MISHRA

Harsh Mishra 6 years, 4 months ago

STP stands for Standard Temperature and Pressure.
NTP stands for Normal Temperature and Pressure.

STP is set by the IUPAC as 0°C and 100 kPa or 1 bar.

Many old books and online sources say that standard pressure is 101.325 kPa (the old IUPAC standard that was changed in 1982), but It defer to the current IUPAC standard of 100 kPa.

NTP is set at 101.325 kPa but uses 20°C as the temperature.

Note:
0°C = 273.15K
20°C = 293.15K

At STP: Pressure = 1 bar = 0.987 atm
Temperature = 273 K or 0°C

At NTP: Pressure = 1 atm
Temperature = 293 K or 20°C

Also,
1 atm = 1.013 bar
1 atm = 76.0 cm
1 atm = 0.760 m

Here,
cm = centimetre
m = metre
atm = atmosphere

ANSWER

At NTP what will be the volume of molecules of 6.022 X 10 raise to the power 23 of H2?

Posted by Shriyanshi Gupta 6 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

How is mole related to (a) no of atoms or molecules (b) mass of substance

Posted by Janvi Sharma 6 years, 4 months ago

CBSE > Class 11 > Chemistry

2 answers

#Aditi~ Angel???? 6 years, 4 months ago

The mass of one mole of any atom/molecule is equal to its atomic molecular mass in grams. The molecular formula of water is H 2 O The atomic mass of H = 1 The atomic mass of O = 16 In a sense, the formula means H + H + O So... 1 + 1 + 16 = 18 Therefore, the mass of one mole of water = 18 Grams Thanks @diti?

#Aditi~ Angel???? 6 years, 4 months ago

Avogadro's number is a proportion that relates molar mass on an atomic scale to physical mass on a human scale. Avogadro's number is defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance. It is equal to 6.022×1023 mol-1 and is expressed as the symbol NA. Thanks @diti?

ANSWER

Comment on the statement 1mole of h2o

Posted by Janvi Sharma 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

#Aditi~ Angel???? 6 years, 4 months ago

The mass of one mole of any atom/molecule is equal to its atomic molecular mass in grams. The molecular formula of water is H 2 O The atomic mass of H = 1 The atomic mass of O = 16 In a sense, the formula means H + H + O So... 1 + 1 + 16 = 18 Therefore, the mass of one mole of water = 18 Grams Thanks @diti?

ANSWER

Why 2p is possible?

Posted by Yuvika Gupta 6 years, 4 months ago

CBSE > Class 11 > Chemistry

15 answers

Yuvika Gupta 6 years, 4 months ago

Ok thanks for answer

#Aditi~ Angel???? 6 years, 4 months ago

Ok Preet we are Friends now...

Robinpreet Kaur 6 years, 4 months ago

Bbye yaar eet at 2 :15

#Aditi~ Angel???? 6 years, 4 months ago

Joy cheatted u Don't talk to him now...?

Robinpreet Kaur 6 years, 4 months ago

Take care and be aware from these type of friends like joy &Ayush ....... they cheats

Robinpreet Kaur 6 years, 4 months ago

Now bye we char at afternoon on 2:15

Robinpreet Kaur 6 years, 4 months ago

Yes i am a girl

Robinpreet Kaur 6 years, 4 months ago

Don't worry Aditi we r friends from now bcoz i am a girl and i understand ur feelings

#Aditi~ Angel???? 6 years, 4 months ago

Hey preet u r also a .......??

Robinpreet Kaur 6 years, 4 months ago

Yes u r right Aditi ???????????

#Aditi~ Angel???? 6 years, 4 months ago

Jagtar jao Joy ke sath see below chats they ar3 not friends they are cheaters....Especially Ayush Brother ?????

Robinpreet Kaur 6 years, 4 months ago

Ete mean are

Robinpreet Kaur 6 years, 4 months ago

Hi yuvika. Sister can we ete friend on this app

Honey ???? 6 years, 4 months ago

Are u clear

Honey ???? 6 years, 4 months ago

2p is possible , 1p is not posible bcoz 1st orbit mein max 2 electrons hi reh skte hai wo s orbital fill kr deta hai

ANSWER

Which two theory Dalton's could not explain?

Posted by Jignesh Patel 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Yuvika Gupta 6 years, 4 months ago

the laws of chemical combinations , laws of gaseous volumes , reasons for combining atoms.

ANSWER

Hlo Every One, Kha chle gye aap log.!!!!!! @aditi ji

Posted by Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

CBSE > Class 11 > Chemistry

49 answers

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

Ok

#Aditi~ Angel???? 6 years, 4 months ago

Ok

#Aditi~ Angel???? 6 years, 4 months ago

Bye tc see u Friend

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

I ll come at 8

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

ok. Bye bye.

#Aditi~ Angel???? 6 years, 4 months ago

Bye now otherwise the mentors will block us on this app

#Aditi~ Angel???? 6 years, 4 months ago

Ok if not i will come at 8 to 9

#Aditi~ Angel???? 6 years, 4 months ago

Can u come betwween 10 to 11...

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

When will be talking us today. Tym?? app this only. Ok

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

Yaa. U too ok.

#Aditi~ Angel???? 6 years, 4 months ago

Ok i will come...but Krish take care of urself?

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

ok. Bye bye. U too take care. Nd remove the thought of sucide from uor mind ok. Be happy and cheerfull

#Aditi~ Angel???? 6 years, 4 months ago

No i can at 8-9 but at that neither yash nor Honey will be there...ok bye Friend take care c u again...

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

Ok.sure. But why dont u come. Plz come naa

#Aditi~ Angel???? 6 years, 4 months ago

If i will not come then u plzz tell it to (Honey???) & (Yash?) too

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

Yaa sure. I ll be there. But it is too late naa. 12 O clock.

#Aditi~ Angel???? 6 years, 4 months ago

Will u come at night for talking friend??

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

Tell him. To report both of them from this app.ok

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

Yes.

#Aditi~ Angel???? 6 years, 4 months ago

Ya he is this app only and yash too i will about both of them .....iwill tell now at night plz u too also come ok....& say what they had talked about me??

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

How is honey. I think he is uor best frend. Yes tell to him about them

#Aditi~ Angel???? 6 years, 4 months ago

Bye.....I will tell him now

#Aditi~ Angel???? 6 years, 4 months ago

Nooo it very bad environment here not for studying but doing vulgar & the Friends are just hilarious bastar foolish brothers .....im gonna tell honey about Ayush & Joy ....wait n watch???????????????????????

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

yes. But Abhi bhi yrr tum usi baat ko. Le krr baithi ho. I told u naa. Removoes those word from uor mind.

#Aditi~ Angel???? 6 years, 4 months ago

I can't sleep at night bcz of those bloody friends & brothers

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

Aditi plz dont go from this. App. It is a great envirnoment for.studying as wellas for mood relexing. Great for geting new frends. Is it?

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

I think u gona crzy. Dont cry. Never talk to them. Ok

#Aditi~ Angel???? 6 years, 4 months ago

I will never come on this app again.....bye to all of my dearest friends....bye Forever ???????????

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

They are not gud. U just romove that chat from uor mind. Ur not fake.

#Aditi~ Angel???? 6 years, 4 months ago

I will die my friend ...u plzz Don't mind...???????

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

Hlo aditi. Never do thought of sucide. Ok.

#Aditi~ Angel???? 6 years, 4 months ago

See below chats..what they eaid that im fake...ok if im fake plzzz dont talk to me...Both of them?????????????

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

What are u saying. Are u gona crzy. Talking about diying. I told u na . Dont mind them. Plz . Dont do that.

#Aditi~ Angel???? 6 years, 4 months ago

I will dienow??????????????

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

yes . It was bad . But u dont mind. Ok. Be happy always.

#Aditi~ Angel???? 6 years, 4 months ago

I will do....

#Aditi~ Angel???? 6 years, 4 months ago

Gow can they say that about me...& Ayish i made a good brother of mine on this app....how can he do it???????????????????

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

Yes i seen. It was hardious. Not apprtiatable. Both chated worng.

#Aditi~ Angel???? 6 years, 4 months ago

See...??????

#Aditi~ Angel???? 6 years, 4 months ago

See the chats below & upper chats with 131 conments????.....i dont want yo live now...????????????

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

kb??, i dont know?, what happend yesterday. Becoz i was not online at the late night!

#Aditi~ Angel???? 6 years, 4 months ago

Akhand kal kya kya hua mere baare mai....??????????????????????

#Aditi~ Angel???? 6 years, 4 months ago

So?

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

I studies in FIITJEE Delhi

Ayush Vishwakarma?? 6 years, 4 months ago

I also kis school me padhte ho

Ayush Vishwakarma?? 6 years, 4 months ago

I m from u.p near laxmi mandir

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

from where r u? I am from Kashi

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

oh hy,ayush. Whatsup?

Ayush Vishwakarma?? 6 years, 4 months ago

Bol yaar i also the friend of aditi

ANSWER

Ifudig jfuvifi r7gh vf7u त्ज्घोईब्द ह्द्विय्ह्ज झ

Posted by Divyanshu Shukla 6 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

What do you understand by octet rule???

Posted by Rehan Ali 6 years, 4 months ago

CBSE > Class 11 > Chemistry

2 answers

Somya Mehta 6 years, 4 months ago

Eight electron in the outer most shell

Ankita Fatania 6 years, 4 months ago

Basically it state that there are eight electron in outermost shell of an electron

ANSWER

Define one atomic mass unit (amu).?

Posted by Shriyanshi Gupta 6 years, 4 months ago

CBSE > Class 11 > Chemistry

3 answers

Honey ???? 6 years, 4 months ago

Mass of

Honey ???? 6 years, 4 months ago

You can define it also as 1/16 of an O2 atom

Ankita Fatania 6 years, 4 months ago

amu is the atomic mass unit denoted by 'u'. It is the mass of 1/12 Carbon-12 atom.

ANSWER

Calculate the no. Of moles in 350cm cube of CO2 at 273k and 2 atom

Posted by Pranjal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Calculate the percentage composition of ca(no3)2

Posted by Janvi Sharma 6 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

why the size of oxygen is greater than size of nitrogen?? ??

Posted by Kunal Sharma 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Yuvika Gupta 6 years, 4 months ago

Because from left to right atomic size decreases because within period the outer electronsare in same valence shell and the effective nuclear charge increases

ANSWER

How to make notes and to score good marks in all subjects of physics, chemistry, math please tell

Posted by Kala Babu 6 years, 4 months ago

CBSE > Class 11 > Chemistry

4 answers

#Aditi~ Angel???? 6 years, 4 months ago

Vedantu is the Best????????????????

Yuvika Gupta 6 years, 4 months ago

Ncert is the best source....... Just read and write the notes

Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

For maths get the help of unacadmey

Honey ???? 6 years, 4 months ago

Get it on google

ANSWER

Who has studied the Solid State Chapter. What is its moto to study that chpter?,

Posted by Akhand Pratap (Krishna) Tik Tok~Mr_Akhand_07 6 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

How are physical properties different from chemical properties? In short

Posted by Shriyanshi Gupta 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 6 years, 4 months ago

Chemical	Physical
Chemical properties are properties that can be observed or measured when a substances undergoes a chemical change.	Physical properties are properties that can be observed without bringing a chemical change.
A chemical reaction needs to be conducted to show the property.	No chemical reaction is needed here.
Chemical properties are connected to chemical bonds of a substance.	Physical properties do not have such relationship.
It can be used to predict how substances react.	It is mostly used in identifying or describing the substance.
Chemical properties of a substance can include buoyancy, viscosity compressibility, radioactivity, toxicity, flammability, heat of combustion, reactivity between chemicals, etc.	Examples of physical properties include: molecular weight, boiling point, melting point, freezing point, volume, mass, length, density texture, color, odor, shape, solubility, etc.

ANSWER

As we know that on moving up to down in a group size increases. But In 3d,4d and 5d series except group no 3, size of 4d and 5d series is constant becoz difference of z is 32 but why the increasing order of size of elements of group no 12 is zn<cd<Hg (their difference of 4d &5d series is also 32)...plzz any one answer!!!

Posted by Abc . 6 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

How do you explain that 31Ga has slightly higher ionisation enthalpy than 13Al although it occupies lower position in the group?

Posted by Sakshi Pathak 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Gaurav Seth 6 years, 4 months ago

Gallium -Ga -outermost valence shell electronic configuration-4s²4p₁
Aluminum-Al-outermost valence shell electronic configuration-3s²3p¹
Before valence shell configuration ,Ga 10 electrons are filled in d-orbitals which has poor shielding effect. so effective nuclear charge will increase and hence Ga will be smaller in size than Al.
As nuclear charge is more, it is difficult to remove an electron from outermost shell of Ga, hence ionization energy is more than Al.

ANSWER

Explain line spectrum of hydrogen

Posted by Sahil Singla 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Gaurav Seth 6 years, 4 months ago

The emission spectrum of atomic hydrogen is divided into a number of spectral series, with wavelengths given by the Rydberg formula. These observed spectral lines are due to the electron making transitions between two energy levels in an atom.

ANSWER

What is polyvalency

Posted by Anil Meher 6 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

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