In which musical note did Newland put the metals Co and Ni with halogens?
Do
Newlands’ Law of Octaves organized elements by their increasing atomic weights and aligned them with musical notes. In this arrangement, cobalt (Co) and nickel (Ni) were grouped with halogens (fluorine, chlorine, etc.) under the musical note "Do."
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