What do you mean by New …

In 1864, an English Chemist, John Newland developed a new method to classify the elements. According to him, when elements are arranged in order of increasing atomic masses, every eighth element has the same properties as the first element. This means that the properties of the eighth element were the same as those of the first element and properties of the ninth element were the same as those of the second element and so on. He called it as the Law of Octaves because this was the same as we observe in the musical notes. Same note gets repeated after a gap of seven. For example,

Based upon Newland's Law of octaves, the classification of a few elements is as follows:

Thus Li, Na and K have gap of seven elements and they show similar properties. Similarly Be, Mg and Ca also have gap of seven elements. These elements have also similar properties.