The Modern periodic table has been evolved through the early attempts of Dobereiner, Newland and Mendeleev. List one advantage and one limitation of all the three attempts.

Explanation

To answer the question regarding the early attempts of Dobereiner, Newland, and Mendeleev in the evolution of the modern periodic table, we will list one advantage and one limitation for each of these chemists.

### Step-by-Step Solution:

1. **Dobereiner's Triads:**
- **Advantage:** Dobereiner grouped elements into triads based on similar properties. This was one of the first attempts to classify elements and highlighted the idea of grouping elements with similar characteristics.
- **Limitation:** His system was limited to only a few elements and did not apply to all known elements at the time. It failed to accommodate transition metals and other elements that did not fit neatly into his triads.

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