Question

PERIODIC CLASSIFICATION

1. State law of Doberiner’s traid and give example.

2. State Newlands law of octaves.

3. Demerits of Newlands law of octaves.

4. What is traid?

5. Identify Dobereiner’s triads from the following group elements having similar chemical properties.

(a) Mg (24.3), Ca (40.1), Sr (87.6)

(b) S (32.1), Se (79.0), Te (127.6)

(c) Be (9.0), Mg (24.3), Ca (40.1)​

Answer 1

Answer:

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