Which two elements were put in the same slot by Newland?

Question

Question

This question was previously asked in

RRB Group D 28 Sept 2022 Shift 3 Official Paper

Answer 1

The correct answer is "Co and Ni".

Key Points

Newland arranged elements in their increasing order of atomic masses and found that every eighth element had the same properties.
This attempt was the first to assign atomic numbers to each element.
He gave the Law of Octaves.
Newland placed Cobalt (Co) and Nickel (Ni) in the same group as they had similar properties.

Additional Information

Newland's law was the first to be based on atomic weight.
In this table, every element did not show similar properties after Calcium.
At that time only 56 elements were known.
Iron also had similar properties to Nickel and Cobalt but it was placed far more than these two.