11. In 1864, the English chemist Newlands noticed that if the elements were arranged in order of increas relative atomic mass, then every eighth element had similar properties, rather like the eighth note octave of music. Fig. 9.8 shows part of the arrangement of elements proposed by Newlands in supp 'law of octaves.

(a) What was the basis of the 'sort of repetition' observed by Newlands?

(b) From the above table, give one example of a group of elements which is:

(i) found in the same group in the modern Periodic Table

(ii) not found in the same group of the modern Periodic Table

(c) Suggest why Newland's octaves were not well received by fellow chemists of his day.

H L Be B C O F Na Mg Al Si P S K Ca Cr Ti Mn Fe Fig. 9.8