Newland Law of Octaves
Newland, a British Chemist made an attempt in 1865 to arrange atoms in increasing order of their atomic mass. He stated that when atoms are arranged on the basis of increasing order of the mass then every eighth element exhibits similar properties. This arrangement was based on his understanding of musical notes where the word repeats after every 7th interval. It is similar to Indian Musical Note Sa, Re, Ga, Ma…..
The elements arranged in Newlands law of Octaves are discussed in the image below,
Drawbacks of Newland Law of Octaves
The drawbacks of the Newland Law of Octaves are discussed below,
- It was applicable only to Calcium. After Calcium, every eighth element didn’t resemble the properties.
- Dissimilar elements were placed in the same group while similar atoms were placed in different groups. For Example, Iron was placed with Oxygen and Sulphur.
- Some groups contain two elements in one place. For Example, Co & Ni.
Lother Meyer’s Arrangement
In 1869, Lother Meyer a German Chemist stated that when elements are arranged in order of increasing atomic mass then elements exhibit similar properties at regular intervals.
Periodic Classification of Elements
Periodic Classification of Elements refers to the arrangement of elements on the basis of the periodic repetition of their properties. It means the elements which exhibit similar properties on a regular interval are placed in the same group.
In this article, we will learn about, History of the Classification of Elements, various ways to classify elements, their drawbacks, and others in detail in this article.