Newlands proposed the law of octaves. Mendeleeff suggested eight groups for
elements in his table. How do you explain these observations in terms of modern
periodic classification ?
i) Newlands proposed the law of octaves.
ii) According to Newlands law of octaves, every eight element starting from a given one be a repetition of the first with regard to its properties.
iii) Mendeleeff suggested eight groups for elements in his table.
iv) The elements in the same group have same properties that means every eight element starting from a given element have same property with that.
v) In terms of modern concept, after completion of one shell the properties of elements are repeated.
vi) After completion of ${{ns}^{2}}$${{np}^{6}}$ configuration the properties of elements are repeated.
vii) So Newlands law of octaves and Mendeleeff s suggestion of eight groups for elements are also reliable according to modern concepts.