John Newlands

• John Newlands, a British chemist, in

  1864.
• John Newlands arranged 62 elements in

  an increasing order of their atomic masses.
• the law of octaves, which states that

  every eighth element has similar properties when

  the elements are arranged in the increasing order

  of their atomic masses.
• when elements were arranged according to

  their increasing atomic mass,the elements

  could be divided into eight groups, and their

  arrangement was similar to the musical

  scale.
• • In Newland’s periodic classification, some elements that are not similar were grouped together. Nickel and Cobalt were both placed in the same slot.
• • Element qualities that were distinct were grouped together. Metals such as cobalt, nickel,

  and platinum, for example, were classified as halogens.
• • Newland’s Law of Octaves holds true up to Calcium. Elements with higher atomic masses had atomic masses that were too large to fit within octaves.
• The octave layout was unable to accommodate later discovered components. As a result,

  new elements could not be discovered using this classification scheme.