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A Metal M Belongs To 13th Group In The Modern Periodic Table. Write The Valency Of The Metal.
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Why Does Silicon Has Valency 4 And Chlorine 1?
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Calcium Is An Element With Atomic Number = 20. Is It More Reactive Or Less Reactive Than Mg?
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Which Element Comes After (right) Lithium In The Periodic Table?
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Name Two Elements Whose Valencies Are Equal To Their Group Number.
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What Is The Basis For The Clarification Of Modern Periodic Table?
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Among The Following Elements F, CL, Br And I, Which Does Not Fit In Dobereiners Triads?
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Assertion : Atomic Size Increase On Going Down The Group Reason : New Shells Are Being Added As We Go
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Which Of The Following Will Have The Most Negative Electron Affinity And Which One Has The Least?
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Which One Of The Following Elements Has The Largest Atomic Radius?
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The Modern Periodic Table Has Been Divided Into
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An Element Is Placed In 2nd Group And 3rd Period Of The Periodic Table, Burns In Presence Of Oxygen To Form A Basic Oxide
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Atomic Number Of A Few Elements Are Given Below 10, 20 7 And 14
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With Reference To The First Three Periods Of The Modern Periodic Table, Answer The Questions Given Below
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The Element Of A Period Of The Periodic Table Are Given Below In Order, From Left To Right With One Of Its Element Missing.
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What Is Meant By Group In The Modern Periodic Table? How Do The Following Changes Occur On Moving From Top To Bottom In A Group?
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Given Below Are Few Elements Of The Modern Periodic Table
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Mendeleevs Periodicted The Existence Of Certain Elements Not Known At That Time And Name Two Of Them As Eka-silicon And Eka-aluminium
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Two Elements P And Q Belong To The 3rd Period Of Modern Periodic Table And Are In Group 1 And Group 2 Respectively
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Identify, The Elements With The Following Property And Arrange Them In Increasing Order Of Their Reactivity
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Two Elements A And B Belong To The 3rd Period Of Modern Periodic Table And Are In Group 2 And 13 Respectively.
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An Element A Reacts With Oxygen To Form A2O.
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