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Mendeleev corrected the atomic weight of

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Important Questions on Periodic Classification of Elements

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Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 6 - Periodic Classification of Elements>Practice Exercise>Q 2
The base of the modern periodic table is
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Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 6 - Periodic Classification of Elements>Practice Exercise>Q 3
The group number and valency has no relation in
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Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 6 - Periodic Classification of Elements>Practice Exercise>Q 4
Which period and group in the long form of periodic table contains the maximum number of elements?
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Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 6 - Periodic Classification of Elements>Practice Exercise>Q 5
Zero group was introduced by:
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Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 6 - Periodic Classification of Elements>Practice Exercise>Q 6
The block in which metals, metalloids, non-metals and inert gases are all present
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Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 6 - Periodic Classification of Elements>Practice Exercise>Q 7
Which of the following has least density?
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Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 6 - Periodic Classification of Elements>Practice Exercise>Q 8
Which of the following groups may contain a metalloid?
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Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 6 - Periodic Classification of Elements>Practice Exercise>Q 9
The element with the electronic configuration 3d54s1 is: