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Hydrogen Occupies A Unique Position In Modern Periodic Table, Justify The Statement.
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Give An Account Of The Process Adopted By Mendeleev For The Clarification Of Elements. How Did He Arrive At "periodic Law"?
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The Element With Atomic Number 14 Is Hard And Forms Acidic Oxide And A Covalent Halide.
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Which Group Of Elements Will Form An Acidic Oxide?
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Where Would You Locate The Element With Electronic Configuration 2, 8 In The Modern Periodic Table?
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Out Of Two Elements, Potassium And Sodium, Which One Can Lose Electron Easily? Give Reason For Your Answer
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Out Of The Two Elements X And Y Which Has Bigger Atomic Radius?
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Account For The Following: Elements Of Group 17 Are Monovalent
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Write The Atomic Numbers Of Two Elements X And Y Having Electronic Configuration 2,8,2 And 2,8,6 Respectively.
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What Is Meant By Periodicity In Properties Of Elements With Reference To Periodic Table?
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Assertion : Electronegativity Of Flourine Is Reason : The Electronegativity Of The Elements Increases
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Assertion : Noble Gases Are Also Called Inert Gases. Reason : Noble Gases Have A Complete Octet
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Assertion : Elements Of Group 16 Are Monovalent. Reason : Elements Of Group 16 Have Seven Electrons
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Assertion : The Elements Of The Same Group Reason : The Elements Of The Same Group Have The Different Number
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Assertion : Be, Mg And Ca Can Be Classified Reason : Atomic Mass Of Mg Is Approximately
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Which Of The Following Property Increases Down The Group?
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What Type Of Oxide Would Eka-aluminium Form?
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Which Of The Following Statements Is Incorrect For Atomic Size?
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Where Would You Locate The Element With Electronic Configuration 2, 8 In The Modern Periodic Table?
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A Reaction Scheme Is Shown Below
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One Mole Of A Hydrocarbon X Reacted Completely With
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Which Compound Has An Addition Reaction With Chlorine?
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The Diagram Shows The Molecule, Ethyl Propanoate.
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