CBSE > Class 11 > Chemistry | CBSE Board | Homework Help

Nucleus does not moves inside the nucleus as it is rotating so there is a centrifugal force which makes nucleus to go away from the center Hope you understand.

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What is atomic spectra in brief??

Posted by N A 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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What do u mean by vander vall radius

Posted by Yogesh Sharma 8 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Mohd Suhail 8 years, 4 months ago

This will be a best answer.so understand carefully Actually vanderwalls radius is radius between those two atom who make bonds to each other with no reason means their acter is already full but they make bond.so this bond is called vanderwall bond and the half length of the vanderwalls bond is vanderwall radius. Trust me plzz dont share this because it is a very high level knowledge and people of small knowledge dont understand this concept. Hope u understand.

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What are the failures of bohrs atomic model

Posted by Parth Chaudhari 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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Who discovered electron?

Posted by Sourabh Tiwari 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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Angel Juneja 8 years, 4 months ago

JJ THOMSON was the first man to discover electron through cathode ray experiment

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Sourabh Tiwari 8 years, 4 months ago

Michael Faraday was proposed electron in 1830 with the help of cathode ray tube.

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What is halogen?

Posted by Moitreyee Mojumder 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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Poulami Dasgupta 8 years, 4 months ago

The halogens are a <a href="https://en.m.wikipedia.org/wiki/Group_(periodic_table)" title="Group (periodic table)">group</a> in the <a href="https://en.m.wikipedia.org/wiki/Periodic_table" title="Periodic table">periodic table</a> consisting of five chemically related <a href="https://en.m.wikipedia.org/wiki/Chemical_element" title="Chemical element">elements</a>: <a href="https://en.m.wikipedia.org/wiki/Fluorine" title="Fluorine">fluorine</a> (F), <a href="https://en.m.wikipedia.org/wiki/Chlorine" title="Chlorine">chlorine</a> (Cl), <a href="https://en.m.wikipedia.org/wiki/Bromine" title="Bromine">bromine</a> (Br), <a href="https://en.m.wikipedia.org/wiki/Iodine" title="Iodine">iodine</a> (I), and <a href="https://en.m.wikipedia.org/wiki/Astatine" title="Astatine">astatine</a> (At).They are placed in the 17th group of the modern periodic table. Halogens have valency —1 and are highly electronegative

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Calculate the energy associated with the first orbit of He+ .What is the radius of this orbit?

Posted by Rohit Kushwaha 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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Shivam Sinha 8 years, 4 months ago

R of He+=52.9(n*)/zPm 1 pm=10power-6M 52.9pm=52.9 * 10power-6M R=52.9 * 10power-6(1*)/2M R=26.45 * 10power-6M E=-2.18 * 10power-18(zsquare)/n*j E=-2.18*10power-18(2squre)/1squarej E=-2.18*10power-18(4)/1j E=-2.18*10 power-18 * 4j E= -8.72*10power-18 j

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How to learn periodic table

Posted by Prashant Pandey 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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Aditya Vardhan 8 years, 4 months ago

There are also many ways in short forms as Li-Li Na-Na Ki-K Rab-Rb Se-Cs Fariyad-Fr And many more

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Anushree Sonotra 8 years, 4 months ago

You learn the elements groupwise

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Why it is difficult to measure the size of an atom?

Posted by Suraj Suresh 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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VISEPR theory

Posted by Anushree Sonotra 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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How many moles of Zn(FeS2)2 can be made from 2g of Zn,3g of Fe and 4g of S

Posted by Abhay Singh 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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What is penetrating effect?

Posted by Ankul Chaudhary 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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Nitin Mhamane 8 years, 4 months ago

Penetration refers to how effectively electrons can get close to the nucleus.

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Explain Lewis structure in Hindi language vedio

Posted by Deepika Sheoran 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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What is kjeldas method

Posted by Sujith Kumar Srinivasan 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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Limitations of bohars model ,Rutherford model and pudding model

Posted by Pari Putt 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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What is the formula for finding radius if an electron

Posted by Harshit Jain 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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I want ro see chemistry practical

Posted by Ankita Tomar 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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what is quantum theory

Posted by Rishi Choubey 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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What is a formula to calculate molality when density is given

Posted by Palak Gupta 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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What us the mass of 1mg of nitrogen? Explain

Posted by Harsh Priyadarshee 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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What are coloured compounds and coloured ions compound????

Posted by Lalit Kumar 8 years, 4 months ago

CBSE > Class 11 > Chemistry

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Arun Soni 8 years, 4 months ago

The vast majority of simple inorganic (e.g. sodium chloride) and organic compounds (e.g. ethanol) are colorless. Transition metal compounds are often colored because of transitions of electrons between d-orbitals of different energy. Organic compounds tend to be colored when there is extensive conjugation causing the energy gap between the HOMO and LUMO to decrease, bringing the absorption band from the UV to the visible region. Similarly, color is due to the energy absorbed by the compound, when an electron transitions from the HOMO to the LUMO

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What is the aim of formal charge for the atoms???

Posted by Lalit Kumar 8 years, 4 months ago

CBSE > Class 11 > Chemistry