Which named rule arose from J. A. R. Newlands’s work on classifying elements…
2026
Which named rule arose from J. A. R. Newlands’s work on classifying elements that began in 1863?
Answer: A. Law of Octaves — ConceptPeriodic classification organizes elements according to recurring chemical properties. Early schemes looked for repeating patterns after arranging…
- A.
Law of Octaves
- B.
Periodic Table
- C.
Law of Triads
- D.
Group Theory
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Correct answer: A
Concept
Periodic classification organizes elements according to recurring chemical properties.
Early schemes looked for repeating patterns after arranging elements by their atomic weights.
Application
Newlands observed that similar properties recur at intervals of eight and compared this repetition with musical octaves. His classification is therefore known as the Law of Octaves.
Contrast
Law of Octaves: Newlands’s early scheme based on recurrence at every eighth element.
Periodic Table: a broad tabular organization of elements; the modern table is ordered by atomic number.
Law of Triads: Döbereiner’s scheme that placed similar elements in groups of three.
Group Theory: a branch of mathematics dealing with algebraic structures and symmetry.
Cross-check
The Royal Society of Chemistry traces Newlands’s 1863–1866 papers to the Law of Octaves, while the other choices belong to different concepts or scientists.
Thus, the associated classification method is the Law of Octaves.