Question

Two Döbereiner's triads that exist in the columnsbof Newland's octaves.. ​

Answer 1

Answer:

Only one triad of Dobereiner's triads exists in the columns of Newlands' octaves. For example, the second column of Newlands' classification has the elements lithium (Li), sodium (Na) and Potassium (K), which is a part of a Dobereiner's triad.

Answer 2

Answer :

Döbereiner's triads also existed in Newland's octaves like :

• $\sf \underbrace{Li, \: Na, \: K}$
• $\sf \underbrace{Be, \: Mg, \: Ca}$