Which of the following statements is true regarding Newlands's law of octaves?

John Alexander Newlands in 1865 profounded the law of octaves. He arranged the elements in the increasing order of their atomic weights. He noted that every eighth element had properties similar to the first element. The relationship was just like every eighth note that resembles the first in octaves of music. Newland's law of octaves seemed to be true only for elements up to calcium.