Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.

Explanation

To determine whether Döbereiner’s triads also existed in the columns of Newlands’ Octaves, we can follow these steps:

### Step 1: Understand Döbereiner’s Triads
Döbereiner proposed the concept of triads, where he grouped elements based on their similar properties. The notable triads he identified include:
- Lithium (Li), Sodium (Na), Potassium (K)
- Calcium (Ca), Strontium (Sr), Barium (Ba)
- Chlorine (Cl), Bromine (Br), Iodine (I)

...