Question

1)Law of triads is based on atomic no.
true or false

2)alogens are electronegative elements
true or false

please help me fast
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Answer 1

Explanation:

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Answer 2

Answer:

Dobereiner’s triads and Newland’s law of octaves were early attempts at classifying elements into groups based on their properties. Since many new elements were discovered over the course of the 18th and 19th centuries, the broad classification of elements into metals and non-metals became inefficient. Several experiments were conducted in order to identify elements with similar properties and group them together.

It is important to note that the primitive methods of classifying elements, such as Newland’s law of octaves and Dobereiner’s triads, laid the foundation for the development of the modern periodic table.