The octaves of Newland begin with _______and end with _____

The octaves of Newland begin with _______and end with ______?

AH; Th

BLi; Na

CHe; Ar

DMg; Ca

Answer:

Dobereiner’s triads and Newland’s law of octaves were early attempts at classifying elements into groups based on their properties.
Since many new elements were discovered over the course of the 18th and 19th centuries, the broad classification of elements into metals and non-metals became inefficient.
Several experiments were conducted in order to identify elements with similar properties and group them together
Newland's Law of Octaves states that every eighth element has similar properties when arranged in increasing atomic mass.
The octaves start with Hydrogen (H) and end with Thorium (Th).

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