10th Science 1 | Chapter 2 | Periodic Classification of Elements | Lecture 1 | Maharashtra Board |

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खरच सर फ्री मध्ये तुम्ही आम्हाला इतके छान शिकवतात त्याबद्दल धन्यवाद sir 👌👌👌👍🙏

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[@Sahil10106]

H.W. Mg (24.3), Ca (40.1), Sr (87.6) and S (32.1), Se (79.0), Te (127.6) according to Dobereiner's triads, a+c ------ 2 therefore, a=Mg and c=Sr 24.3+87.6 ---------------- 2 =55.95 is not an Dobereiner's triads a=S and c=Te 32.1+127.6 ------------------ 2 =79.85 is not an Dobereiner's triads

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Sir table ke sare dobereiner's triads hai Beacose mean and middle ka distance minimum 1.3 hona chahiye

[@samiksha4547]

H.W answers 1) mean calculated by dobereiner's method - 55.9 Middle element (Ca)- 40.1 Doesn't match ❌ 2) mean - 79.8 Middle element (Se) - 79.0 Doesn't match ❌

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Dear Sir, excellent lecture ! But please: 1. Talk a little slowly in speed🎉 2. Please Improve your English 🎉 3. After Dobereiner , it's Newland not Newton...🙏💕

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[@vishalpardeshi5081]

Be= 9.0, Ca= 40.1 , acc to dobereiners method a+c /2 9.0+40.1/2 = 24.55 Hence, it is not a Dobereiners triads

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18:00 Sir lekin Dobereiner ne kaha ki average 'a' aur 'b' approximately equal rahega 'c' se.

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Sir phela wala bobereiner's triads main satisfied nhi hota hay uska ans calcium ki value aayi 55.2 pr idhar calcium ki value hay 40.1

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Sir, is it compulsory to learn the periodic table?

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[@talkykitchen3327]

Ca=mg+Sr/2 :•Ca=24.3+87.6/2 :•Ca=111.9/2 :•Ca=68.1 [ Ca=40.1 ] Hence ,dobereiner's triad is not satisfied.

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VERY NICE VIDEO SIR BOTH ARE NOT SATISFIED FOR DOBEREINER TRIADS

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Teeno Dobereiner 's triads me satisfy nahi hote hai

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2nd 79.55 is not a Dobereiners triads, I think 🤔

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Traid 1. Unsatisfied Traid 2. Unsatisfied Triad 1. 55.9 Traid 2. 79.8

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[@lajawaabcooking]

H.W Mg (24.3), Ca (40.1), Sr (87.6) and S (32.1), Se (79.0), Te (127.6)..... According to Dobereiner's triads,.. a+c ÷ 2..... Therefore, a= Mg and c= Sr 24.3 + 87.6 ÷ 2 = 55.95 Is not an Dobereiner's triad, a= S and c= Te 32.1+ 127.6 ÷ 2 = 79.85 Is not an Dobereiner's triads,..

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.

[@aditya98698]

in homework both the triads are wrong ❌ using doberieners method b = a + c / 2

[@shaikhakbarsk1405]

Question: mg(24.3),ca(40.1),sr(127.6) Ca= 24.3+ 87.6= 111.9 111.9÷2=55.95 Ca =55.95 It all elements could not be edible in doberiener's traids Question 2: s(32.1) , se (79.0) , te(127.6) Se: 32.1+127.6= 1597 1597÷2= 79.85 It all elements could not be edible in doberiener's traids....

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Sir digital board pe jo doberiner traid point wo exam likh sakte hai kya by chance questions aya to

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H.W :All triads are not satisfied.. Thank you so much sir 😊

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[@user-yi5xb3xf9i]

00:04 Introduction to the second chapter of Science 1 01:34 Elements are the building blocks of everything in the universe. 05:00 Understanding the properties and classification of elements 06:35 Elements classified based on properties 09:56 Atomic mass and periodic classification overview 11:40 Arrangement of elements based on atomic mass. 14:56 Atomic mass of elements as per the Dobereiner's theory 16:30 Dobereiner's triade success depends on testing different elements 19:36 Newland's periodic table brain and homework assignment

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sir humko modern periodic table ka founder henry mosely bataya hai tho sir correct ans kya hai mendleev ya mosely?????????????

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Mosley is right but meendelev also helped to make modern periodic table

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I also confused

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Mendeleev

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U can follow text book it is given in textbook who is the founder of MPT on page . no : 20 last paragraph

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Kal kis kis ki test hay😂😂

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Dhanyavad sir

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Mi tumacha aabhari aahe

[@akshatamaher1427]

video is very useful for us thank you sir for this video

[@pitambardeshmukh6128]

सर तुम्ही गृहपाठ दिलता त्यामधील डोबेरायनर पैल्याच उत्तर बरोबर येत नाही दुसऱ्याच येत पण ते 79.85 असे येते ❤सर तुम्ही खूप छान शिकवता ❤

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Amezing

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we sir we can use whatever you write on the board as a notes please reply

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Sir thank you ❤

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🎉🎉❤❤

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Hiii sirr i request you too give some SEC's us for screenshot your notes plzz... And thankyou so much for your nice videos... 🌹✨👀🪐❣️

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HW. 1st is not a Dobereiner's Traid's 2nd is also not a Dobereiner's Traid's

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But sir modern periodic table made by hanry Moseley and you are saying mandeleevly mades modern periodic table 8:21 ? I am confused tomorrow is my test

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