Valency || Structure of Atom - 8 || in Hindi for Class 9 Science NCERT
Vložit
- čas přidán 5. 10. 2020
- In this Science (Chemistry) video in Hindi for class 9 we explained valency and how it depends upon the electronic configuration. This is a topic from Chapter 4 -'Structure of Atom' of NCERT Science.
Most of the elements are chemically active, i.e., they participate in chemical reactions and produce compounds. But some of them are chemically inactive, like, helium, neon, argon, krypton, xenon, radon. These elements are known as inert gases or noble gases. The atoms of these elements have unique feature; they have 8 electrons in their outermost orbit (except for helium, which has 2 electrons in its outermost orbit). Atoms of other elements have tendency to attain the electronic configuration of their nearest noble gas. To attain this they lose or gain electrons or share electrons, which decides their valency. Following are the formulae for valency
For atoms donating electrons : 𝑉𝑎𝑙𝑒𝑛𝑐𝑦 = 𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑣𝑎𝑙𝑒𝑛𝑐𝑒 𝑒𝑙𝑒𝑐𝑡𝑟𝑜𝑛𝑠
For atoms accepting / sharing electrons : 𝑉𝑎𝑙𝑒𝑛𝑐𝑦 = 8 − 𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑣𝑎𝑙𝑒𝑛𝑐𝑒 𝑒𝑙𝑒𝑐𝑡𝑟𝑜𝑛𝑠
Valency of some elements
name of the element & valency
hydrogen 1
helium 0
lithium 1
beryllium 2
boron 3
carbon 4
nitrogen 3
oxygen 2
fluorine 1
neon 0
sodium 1
potassium 2
aluminium 3
silicon 4
phosphorus 3, 5
sulfur 2, 6
chlorine 1
argon 0
👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇
🔴 Click here to watch the whole playlist on Chapter 4 : 'Structure of Atom' for Class 9 :
• Structure of Atom (Int...
👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇
Previous videos -
🔴 Structure of Atom (Introduction)
• Structure of Atom (Int...
🔴 Discovery of Electron
• Discovery of Electron ...
🔴 Thomson's Atomic Model
• Thomson's Atomic Model...
🔴 Rutherford Atomic Model
• Rutherford Atomic Mode...
🔴 Bohr's Atomic Model
• Bohr's Model of Atom |...
🔴 Discovery of Neutron
• Discovery of Neutron |...
🔴 How are Electrons Distributed in Different Orbits
• Electronic Configurati...
You are the best teacher rather than my school teacher.
We are agree with you.
Correction - better
Yes bro
Me polytechnic student hu... Aap bohot ache teacher ho.... Bohot achese padhete ho.... Agar. . apke jaise sabhi sar padhte to...maza aa jayega ... Thank you sir... You are the best
Every Teacher is best
You teach slowly, but that gets permanently fit in brain 🤗🤗🤗❤️
One of the best person who has described the concept so clearly that no other can match his efficiency!!! Wish u were in our childhood time!!!!
Highly appreciated
Sir abhi bas main 15:48 pr hi hu but still I'm fully satisfied by the concept of *valency* you're best genuinely... ☺️☺️
Thank you so much , you explain in the best way than our teachers and other youtube channels
Very useful video. Very simple way teaching. I am 34 years old. I have attended 2 class. I will surely recommended others due to sound voice, clear presentation in very simple way. Thanks u very much for sharing this type of video.
*Sir u cleard my all doubts ...tnks a lot sir....*
Sir please made a video on why chromium has multiple valency
Nicely explained.. Thank you teacher👩🏫 😃
Sir, you are really an excellent teacher. आपको कोटि कोटि प्रणाम🙏🙏🙏🙏🙏
Sir your explanation is best all over here... And sir your CZcams channel should be more popular In educational video 😊
Sir, around which nucleus does the shared electron revolve during covalent bond??
Same question
thank you, sir I was trying to understand what is valency since 5th grade but could not understand it but after this video it was completely easy to understand.🤯🤯🤯🤯😌😌😌
Wait for specific stage you will understand everything
Sir you're fantastic teacher....you know what itni saari video dekhne ke baad ab apka video dekh kr doubt clear hua...🙏
Same Babu
are sir aapko kya batau 6:00 meri puri chemistry ke L laga diyee thanks sir you are grate
Your videos clear my doubt like a crystal clear.
Thank you so much sir.
Hi seema
You are the best teacher I ever seen you can explain all things properly
Sir kya magnesium ko boron ke sath combine kra sakte hai jiski valency 3 hai aur kaise magnesium ki valency toh keval 2 hai plez reply
Thanku u thnku So much sir mujhe valency ko solve krna bilkul smajh nhi aa rha tha but apki vdo ko dekh kar smajh aa gya thank u very much sir ❤😅😌💮👨🏫💫💫✨✨✨
sir covalent bond mein common vaala electron dono atom ke around revolve karta hai??
Superb 👌👌thanks,
Keep growing sir...
Good day all of you class 9th
The video was very helpful
Got every thing at once
Sir! Is structure formation me jo two different atoms kisi bond ke through attach ho rahe hain to uss formed compund ki naming kaise decide hoti h like: Sodium chloride ko chloride sodium kyon ni mention kerte????
If lithium will doanate his electron will it be helium ?
You are the world best teacher,..sir please start practice session video ,in chemistry from 1november
Beauty lies in the eyes of the beholder.
🙏🙏🙏🙏
Teacher 🙏🙏...Huge Respect for you
sir ji kyaaaa ada te hai aap manna padega 👍👍👌👌👌👌
Sir i am one of your oldest subscriber,Sir i request you to make a video on variable valency, The concept of variable valency come in the olympiads...
You are best teacher.After video my all doubts is clear. Thank you for video.🤗🤗
Excellent teaching sir👌.
Pls make a separate video on variable valency.
Variable valency in Std 9th???
Wow....
Which board are you studying under???
@@edupoint.secondary Sir I am studying in ssc board of maharashtra. In my textbook, there is only introduction of
variable valency, but I didn't understand. And I also want to learn full concept of variable valency.
And I like your teaching.
Sir 1. configuration of beryllium is 2,2 so it's duplet is completed so why he wants to lose electron? is it not a noble gas as helium with configuration 2 is?
2. Why atoms wants to be stable?
Plese if anyone knows the answer reply becaus it help me a lot please sir you also 🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻
Duplet stability is only for the 1st shell as it has only the s orbital.
The maximum electrons of 1st shell is 2 and of second is 8.
Helium has the atomic number 2 so, if it is a duplet, then it's valence outermost shell is filled. Hence it will not react
But in beryllium, the atomic number is 4 and if it wants to fulfill the valence electrons, it needs total of 10 electrons and it is having only 4
That is why it reacts
sir will you teach tuition?
Make 10th physics and chemistry vedios sir please...
Love ur deep explaination.
Excellent and very useful video, Arijit sir. Thanks a lot. You are a Unique teacher. Take care of your health.❤️❤️☺️☺️☺️👍👍❤️❤️🙂🇮🇳🇮🇳
Thank you sir.... Bhut hi help full vedio rha
Thank you so much for this amazing explanation 🙏🙏
Sir ye kaise pata chalega ki kab kon sa Atom donate karega aur kab kon sa Atom accept/share karega jisse unki valency pata lage
Your explanation is very best 👍🎉☺️
Thank you sir your explanation is excellent I got cleared my all doubt
Sir jab atom. Ke outermost shell mein123 electron ho toh hum electron transfer krenge kya, and jab 567 ho toh share
Yes
Sir aap chemistry bahut badhiya padhate ho
Thank you for helping me ☺️ teacher and explain in Urdu ❤️
You the best teacher I ever meet in this channel thank you sir .
thnk u sir i was really suffering from where this number comes in reaction 💔 thk u so muchh🌹
Sir iss tareeke se videos kese banate hai.
Aap konsa app use karte ho🤔
Thank you sir 🙏🙏🙏🙏 for giving your best knowledge it very helpful for us
Sr g bhot xber10 videos banaty ho lakin 9th or 10th ka pora course upload kia ha kia?
15 :00
Super Teaching sir thank you sir 👍😊🙏
Sir please bataye how to remember valency & variable valency of every atoms.
pehle to bhai atomic number ydd kar lo..... then uska electronic configuration nikalo aur jo ocatate ko fulfil karne ke jitne electrons ko loose karna hai ya gain karna hai wahi uska valency hoga.......
Thanks..................................
You are also best teacher 🙏🙏
Superb
sir please make video on valency of chromium to zinc
Sir .I don't know . But I know you're God for me. Thanks
Thankyou so much siirrr tommmorow is my exam it was very helpful ♥️♥️♥️♥️🙏🙏🙏
sir why doesn't hydrogen have a neutron?
sir the video was very informative and helpful.
thank you
it has only 1electron.
Nice explained... 💖💖💖💖💖
Thak you sir for explain this thank you very much 🙏🙏
Too good.. Thanks a lot..
you are too good sir..
Kya florien or clorine nhi mil sakte or agar mil sakte h to kyo
Main concert starts from 7:30
Thanks
Great job 👍
sir g ye jo hath idr udr krty ho videos ma iska size thora bara krdy plz nazr ni ata ha.agr ye hath idr udr ni kia to samuj bhe ni ate ha to plz iska size bara krdy
सधन्यवाद गुरू जी
Thanks a lot sir ji
Very easy method sir thank you sir
Sir niclus 11and17 kese aya element ka please tell that
Sir ye table samajh nahi aaya hume
Sir pls make a detailed and full video on quantum mechanics.
Hello bhai
My teacher < edupoint sir
Sir, to sodium chlorine se hi react kyu karta hai?????
Mera matlab ki kisi aur element se kyu nhi karta hai
😅😅😅well information good show 😅😅
Yes sir
Sir do every periodic table have different type of atom structure ??🤔😕
No absolutely not!
Sir d block ke elements ki valency kaise pta kre?
🙏 Thank you so much sir
Best chemistry teacher
Sir apka hi smjh me ata h bass abki to majak me sara ka Sara chapter ko lekar padhte h
Why your video not get viral
Sir make 2or3videos for one chapter🤔🤔
sir ap Kab start krengy 11th or 12th class k lecture?
Thank you sir you are the best📝📝
You are my best teacher sir
Sir g ap 1st year k lectures kab upload krengy
Nice info 👍
Sir plzz reply arjent plzz claas 8 Wale kar sakte hai keya plzz rplay
Thank you sir you are jenius sir
Very talented sir ho appp
Thank you so much.
thank you sir
Elements kaisa bana
Valency at 12.51
Only you make my chemistry direct 0 to 100 sir 😢😢😎😎😎😎😎
Love u sir
outstanding teaching sir🙏🙏🙏🙏
Thanks for your support.
🙏🙏🙏
Thanku so much sir
really sir you are great
what is the Velency of Neon if the outermost electrons is 8
It's 0
❤❤❤