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Calculate the Wave length and Wave Number of Radiations emitted

Wave length (λ) of Radiations emitted during Electron jump: When electron jumps from one orbit to another, energy is emitted or absorbed in the form of radiations which have wave length (λ). Wave Number of Radiations emitted during Electron jump: When electron jumps from one orbit to another, energy is emitted or absorbed in the …

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Class 9 Chemistry Fundamentals of Chemistry Important Q/A for Exams

Class 9 Chemistry Fundamentals of Chemistry Important Q/A for Exams: Chemistry branch of science which deals with Composition of matter Properties of matter Changes in matters Different laws and principles which deals with these changes Internal Structure Matter  Anything in the universe which occupy space (having volume) and has mass is called matter. Matters can …

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Difference between Nuclear Charge and Effective Nuclear Charge – Chemistry

What is the nuclear charge in the periodic table? The nuclear charge (Z) is defined as the total charge in the nucleus due to the presence of positive charge protons. As we move through the periodic table, the atomic number continuously increases due to the increase in the number of protons in the nucleus, thus …

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Class 11 Chemistry Chapter Chemical Bonding Important MCQs for Exams

Class 11 Chemistry Chemical Bonding Important MCQs with Brief Answers for Exams: 1.Atoms form chemical bond to become: 1.Reactive 2.Conductive 3.Soluble 4.Stable Answer )  Stable Brief Explanation : Atoms form chemical bond to complete their valence shells like inert gases and becomes stable .The inert gases are stable and non-reactive due to their complete valence …

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Avogadro’s Number and Mole – How is Mole Calculated

Mole is a counting device or a number like: 12 things   =  Dozen 144 things  =  Gross 2 things = Pair 1000 g    =   1k g similarly: 6.022 x 1023 particles =1 mole Mole Definition: In Chemistry , mole is defined as the amount of substance that exactly contains 6.022 x 1023 particles. . For …

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Important mcqs Class 11 Chemistry with Answers Chapter wise

Chapter-Wise multiple Choice Question with brief answers for Class 11 Chemistry: Chapter 1: Basic Concepts of Chemistry Important MCQs Chapter 2 :Structure of Atom Important MCQs (Part 1) Chapter 2 :Structure of Atom Important MCQs (Part 2) Chapter 3 Chemical Bonding Important MCQs (Part 1) Chapter 3 : Chemical Bonding MCQS ( Part 2) More …

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