Best Mcq Structure of Atom Class 9 Full Chapter | CBSE Class 9 Chemistry Chapter 4

[@mcqncert]

For other Chapter MCQ of Class 9, watch playlist in link below MCQ CLASS 9 SCIENCE NCERT: kzbin.info/aero/PLqL8x8BtIUaT1SbMWeVDc1fFZYP_WhWoe MCQ Class 9 MATHS NCERT: kzbin.info/aero/PLqL8x8BtIUaSiKCfulGjjiJH-KvLDRW8N MCQ NCERT CLASS 9 SST: kzbin.info/aero/PLqL8x8BtIUaT9VD179l25bruqC4bsP6wS

[@Jeeaspirant_2026_vlogs]

Hi

[@Aniket_9296]

8

[@Harshit-pp1he]

Thank you bhaiya I scored 32% in mid term (I was failed 😢) Then I started to see videos on KZbin I scored 98% in UT-3,4 I will give my best in December exams

[@Harshit-pp1he]

KZbin is the key to success

[@LaxmanMarndi-v5i]

The valency of Mg2+=0 and the valency of Na+=0

[@kundankumarpal1234]

Valence electron of Na+ 8 Valency = 0 Valence electron of Mg²+ 8 Valency =0

[@pihushorts2611]

Valence electron in MG^2+ is 8.

[@santoshkumarsingh468]

Thank you very much sir it really helpfull😄

[@narrowstar1844]

thanks you sir you clear my important doubt within a minute😀😊

[@ashifraja6786]

Sir this video is very helpful for me Thank u so much 😎😎😊😊😊😊

[@ManojKaushik-kx5sb]

Thanks 🎉🎉sir ji 🎉

[@mcqncert]

Ans33 is option C

[@shreya______]

The valency of Na+ :0 The valency of Mg2+:0 Valence electron of magnesium will be 8

[@rajeevyadav7086]

Bahi valency nhi puchi hai valence electrons pucha gya hai

[@baruahbrothers2377]

17:30 Sir, In Question no. 33, The correct answer is C. Explanation:: a) the same physical properties : Isotopes don't have same physical properties as their masses are different. So this option is wrong. b) different chemical properties : Isotopes have the same chemical properties as their number of electrons and protons are same. So this option is wrong. c) different number of neutrons : We all know that isotopes are of the same elements. This means that their atomic numbers are the same, i.e numbers of protons are also same. Now , we all know that mass number is nothing but the same of Number of protons and Number of neutrons. As the mass numbers are different but number of protons are same. Therefore, the number of neutrons have to be different. So, this option is correct. d) different atomic numbers : This option is wrong as they have the same atomic numbers. So, the correct answer is C. Sir, pls justify my answer...

[@mcqncert]

Very good beta.. Bravo

[@annyeongindia4751]

Awesome

[@vasavidara2006]

You are genius and thank you

[@RAJESHKUMAR-dx4ek]

Very useful video to us Thank you sir Nice👏👏👏👏👏 sir

[@ankitak6326]

Sir I wanna ask you "what are isotones " Plz..... Reply sir I really need it 🙏

[@mcqncert]

Which have same number of neutrons

[@ankitak6326]

@@mcqncert thank you sir

[@tanveethakre6457]

Its isotopes not isotones😊

[@vinodkumarjha7883]

@@ankitak6326 same no of neutrons different atomic number ,mass number,species ,ec example sodium and magnesium

[@vinodkumarjha7883]

@@tanveethakre6457 r u mad isotopes have same no of neutrons

[@jyotiverma7907]

Answers : Valency of na+ = +1 Valency of mg2+ = +2 Valence electron of mg2+ = 8

[@MohsinKhan-nt2su]

Ap ne boht acha smjaya he sir

[@baruahbrothers2377]

18:44 For Mg2+, Valence electrons = 8 Valency = 0 For Na+, Valence electrons = 8 Valency = 0 Sir, is it correct ??

[@mcqncert]

Correct

[@googlemoney6090]

@@mcqncert what you mean it's not correct its abselutely correct may your channel grow 🥰🥰🥰🥳

[@kingorqueen7119]

𝚈𝚎𝚜

[@ashifraja6786]

Valence electron in mg 2+ is 8

[@คlคภ]

Electric config of Na^+ is 2,8 bcoz it is cation v= 1 Electric config of Mg^2+ is 2,8 (same reason) V= 2

[@shubham7563]

Na+ Valance electron= 8 valency = 0 Mg²+ Valance electron = 8 Valency= 0 Very easy question sir 😊😊😊😊

[@shubham7563]

@@legendgaming2180 Valency Na = +1 Na+ =0 Mg = 2 Mg²+ = 0

[@jod_zerox]

Isotope of iodine is used in treatment of cancer not iodine

[@shylaja183]

Thank you so much sir for example thank you🎉❤👍🤝

[@abdulwaheed8385]

nice sir thankyou it is very helpful

[@hemantakumar1659]

Which kind of facility I can gate from you (in this chennal) If will be member.

[@shahastabegum914]

Na+ velency is 0 And Mg velency is also 0 And Mg²+configuration is 2,8,2

[@shahastabegum914]

It is right??

[@rishabhrathore5294]

15:18

[@swatipandey1188]

Thank you so much sir😊😊

[@badrikamahanta9947]

Thanks for help sir 🙏

[@ghanshyammahto6482]

Thank you so much sir 👃👃

[@shifashowkat83]

question no. 35 ans 2,8,1

[@arunchopra100]

0.52 approximately mat yaad kro real main 1840 times hota h

[@Harshit-pp1he]

17:50 valency -1,+2

[@laxmipriyasahu9842]

34/35😮😮😊really I don't believe myself 😮😮😮

[@LaxmanMarndi-v5i]

Q.33 answer is option C

[@badrikamahanta9947]

Nice explanation sir 🙏

[@mcqncert]

Thanks and welcome

[@mahfuzbepari2972]

Thanks becoming ready for exam

[@simransehdev279]

Valence electrons of Mg2+ is equals to 8 .. Nd valency = 0

[@JyotiRajwade-gz3qc]

Electric configuration of Na = 2,8,1 lose one electron (v= 1) Electric configuration of Mg = 2,8,2 lose two electron (v= 2)

[@karansinghav7439]

sir very easy question But some ques increase my knowledge related this chapter . so the video is perfect 👍

[@mcqncert]

Glad to hear that

[@Talentina998]

33 q option c

[@harphoolmawaliya630]

Iam sararti

[@sheetaljaiswal945]

Nice videos Very helpful...🥰🥰🥰

[@BlinkXmonstiez]

29/35 ☺️

[@Harshit-pp1he]

17:22 8 in both

[@yasir_shafi_vlogs]

Sir what is flotation? Sir plz reply me

[@mcqncert]

To float on fluid..

[@jyotiverma7907]

@LEARNING WITH SHASHANK SHEKHAR Sir , In Question 33 I think Option-(C) should be correct because you only told that It has different mass no. , So It has different no. Of neutrons. But they have same no. Of protons that's why atomic no. Is same..

[@sudipapal1226]

Ya I also think so.... And sir told that they have same chemical property but in the option it is given that they have different chemical property.

[@rahultickoo5533]

@@mcqncert Dear, you are yourself saying, chemical properties are same. But in option it is written as different. Would be better if you would just pin a comment mentioning the correction.

[@mcqncert]

@@rahultickoo5533 yes you are correct ans 33 is different number of neutrons..

[@futuredoctors7795]

Great sirr g🙏🙏🙏

[@sarvajanikbaethakabarauni6873]

Ans - 4

[@joshuakjustin6907]

Your video is helpful 😢

[@dggamingyt.3111]

Which isotope is used to detect tumour sir is ka kiya answer ha

[@mcqncert]

Cobalt 60

[@purple00091]

Correct answer -Arsenic-74

[@purple00091]

​@@mcqncertcobalt -60 r used in the treatment of cancer

[@Akash_Gupta770]

Sir one mistake is there 10:29.. You speak has but has is not there .

[@AbdulQayoom-h6v]

Thanku sir ❤❤

[@Shivtisri]

Alpha particle ka charge kya hota hai +ya-

[@mcqncert]

+

[@Shivtisri]

@@mcqncert thanks

[@Deepaksharma-dv1di]

Sir aap ye kis aapo se banate ho plz bataiye mujhe bhi

[@AjayVarshney-ny8pq]

Thank you very much sir 😊

[@pranavpalaskar1985]

Helpful

[@manoranjantripathy2669]

Thanks sir good explanation . Very best MCQ are there😅

[@ayushsrivastav7691]

Valance electron mg2+ =8

[@drawingwallah2379]

Excellent

[@aditi480A2Z]

17:29 Na+ → 10 Mg²+→10

[@Harshit-pp1he]

Only outermost shell electrons will be counted

[@rishi4794]

Sir plZ periodic test 3 ke old papaers aarange kr dijiye class 9

[@mcqncert]

Chapter??

[@rishi4794]

@@mcqncert full paper including physics ,chem,bio Ch-4,11,13

[@brijrajbhaichaudhary7041]

I have answered 33 out of 35 correct without options

[@ShAnTaNu-x]

33/35❤ 18:41

[@Ayanshu45]

Sir nucleus ki radius 10 ^-5 hoga 😊

[@mcqncert]

No

[@Arpitapatel96]

Sir please make a video valancy🙏🙏🙏🙏🙏💯💯

[@badrebel4241]

Thavks for my knowledge increasing🥺😵

[@SunilKumar-oi2cl]

The valence electron of Mg + 2 in is 8 and valency is zero valence electron of Na+is equal to 8 valency is zero

[@shivambaunthiyal6447]

33 is wrong answer will be c

[@SANTOSHKUMAR-ww4mu]

The answer of every question is right. Thanx sir

[@devil6433]

Is culumb is the SI unit ??

[@mcqncert]

Yes of charge

[@khara_manas]

Coulomb is SI unit of charge

[@SeemaSharma-vs3sh]

Very easy questions thank you sir 🙂😊😊☺️☺️🥰🥰💞💞❤️❤️😍😍😍😍🌞🌞🌞🌞🌞⭐⭐💖💖👍👍❣️❣️😗😗

[@Gupta00211]

Question no. 11 me 12000 nhi balki 20000 me 1 rebound hua tha

[@krrishd9003]

12000 tha

[@studywithalfisha]

Mg²± =8

[@IBS0009]

Simply best

[@subikshakarthikeyan352]

Thanks sir

[@parinith.p1981]

thanks a lot sir!!!...

[@kanishkasharma3511]

35 / 32 😁😁

[@Deepanshu_7065]

😊1Hrs left My exam😢

[@shifashowkat83]

its charge of electron is 1.6×10 raise power minus 19 not proton

[@ajishalini5370]

Thank you sir

[@danyeerdx]

Sir question number 33 ka answer kya hai

[@letsplaywithmarshmello3446]

20 elements keep atomic number Nahi mass

[@drawingwallah2379]

Superb

[@GAKYYofficial4358]

11-1=10 na

[@MohsinKhan-nt2su]

Your are genius sir

[@DivyaSharma-cd1wl]

Na+ Valence electron - 8 Valency - 0 Mg2+ Valence electron - 8 Valency - 0

[@DivyaSharma-cd1wl]

Sir this question is very very easy 💗💗

[@PrinceRai-wg9vs]

Electronic configuration =(2,8) Valence electron =8 Valency =0

[@AnilKumar-dy5gr]

Thank you sir you are the best teacher in the world 🎉❤

[@drawingwallah2379]

Good

[@aadityathapa5676]

Thanks you bro

[@adarshyadavanshi6773]

Electron

[@gokueditz09w]

So much easy questions

[@KGMC.NURSING_PCB]

❤❤❤❤

[@drawingwallah2379]

Pro level

[@lalipradhan2159]

Atomic number of magnesium is 12 so, no. Of electrons is 12-2 that is 10 and Valence electrons is 8,2,8

[@Arpita8907]

Thank you sir for posting this vedio 👍👍

[@anshikaarmy654]

Thnq so much sir for posting this...first like and comment

[@anshikaarmy654]

First time..

[@MohsinKhan-nt2su]

Love u from Pakistan sr.

[@mcqncert]

Same here from INDIA..

[@MohsinKhan-nt2su]

❤️❤️😘

[@sourabhkumar0098]

You are nice keep going😂

[@aaravx0001]

2'8'1