State the law of octaves .

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 ?

Who proposed the law of octaves ?

(i) Newlands proposed the law of octaves. ii) The law of octaves was not valid for elements that had atomic masses higher than calcium. iii) Newlands left blanks for new elements in his periodic table. Which statement is wrong?

Do you know why Newlands proposed the law of octaves ? Explain your answer in terms of the modern structure of the atom .

The law of octaves was stated by :

Write few sentences about Newland's law of octaves. The elements present on the right side of the modern periodic table known as.

State law of triads .

State the laws of reflection of light.