Newlands' Law of Octaves was an early attempt to organize elements based on their properties and atomic weights. It proposed that elements exhibit properties similar to the first element every eighth position when arranged by increasing atomic weight.
This law was found to be applicable only for the lighter elements. It successfully predicted the properties of elements up to a certain point.
The pattern observed in Newlands' Law of Octaves broke down after the element Calcium (Ca). Beyond Calcium, the eighth element did not possess properties similar to the first element in the sequence. Therefore, the law was only applicable up to Calcium.
The correct option identifying the last element up to which Newlands' Law of Octaves was applicable is Calcium.
Element X forms a chloride with the formula XCl2, which is a solid with high melting point. X would most likely be in the same group of periodic table as
Element X forms a chloride with the formula XCl2, which is a solid with high melting point. X would most likely be in the same group of periodic table as