2. Why was Newland's law of octaves discarded?
2. Why was Newland's law of octaves discarded?
Newland's law of octaves was discarded because:
(i) This law worked well for lighter elements (up to calcium), but it could not be applied to heavier ones (elements of higher atomic masses) because starting from calcium every eighth element was found to have properties different from those of the first element.
(ii) Newlands emphatically said that only 56 elements do exist in nature and no more element is likely to be discovered in the future. But this concept was later on found to be untrue with the discovery of many new elements which defied the law of octaves.
(iii) In arranging elements in the form of a table, Newlands clubbed two elements together at the same place and in the same column. Not only this, but he also placed some dissimilar elements in the same column. For example, Cobalt (Co) and nickel (Ni) were clubbed together in the column of fluorine (F), chlorine (CI), and bromine (Br).
Newland's law of octaves was discarded because:
(i) This law worked well for lighter elements (up to calcium), but it could not be applied to heavier ones (elements of higher atomic masses) because starting from calcium every eighth element was found to have properties different from those of the first element.
(ii) Newlands emphatically said that only 56 elements do exist in nature and no more element is likely to be discovered in the future. But this concept was later on found to be untrue with the discovery of many new elements which defied the law of octaves.
(iii) In arranging elements in the form of a table, Newlands clubbed two elements together at the same place and in the same column. Not only this, but he also placed some dissimilar elements in the same column. For example, Cobalt (Co) and nickel (Ni) were clubbed together in the column of fluorine (F), chlorine (CI), and bromine (Br).
