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Class 11ChemistryClassification of Elements and Periodicity in PropertiesHistory of periodic table
Easy

$Li, Na, K$ form a Dobereiner's triad. If the atomic masses of $Li$ and $K$ are $7$ and $39$ respectively,what will be the atomic mass of $Na$?

  • A
    $23$
  • B
    $46$
  • C
    $15$
  • D
    $32$
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Class 11 Questions

Class 11

Chemistry Questions

Chapter

Classification of Elements and Periodicity in Properties

Subtopic

History of periodic table

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