Question

how many elements were discovered on the time of John Wolfgang Debonair​

Answer 1

Answer:

In 1817 a German chemist Johann Wolfgang Dobereiner arranged the elements with similar properties into groups. Some groups were identified having three elements each.

S. No. Element with Symbol

1. Barium (Ba)

2. Chlorine (Cl)

3. Bromine (Br)

4. Iodine (I)

Answer 2

Answer:

During the time of classification elements by Dobereiner there were very few elements (less than 33 elements) discovered.

Explanation:

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