Question

did dobereiner's traids also exist in the columns of newlands'octaves? compare and find out.

Answer 1

Yes, Dobereiner's triads also exist in the columns of Newlands Octaves. For example, the second column of Newlands classification has the elements lithium (Li), sodium (Na) and Potassium (K), which constitute a Dobereiner's triad.

1
Secondary SchoolScience 13 points



a) Dobereiner's Triads and Newland's Octaves

According to Dobereiner's when elements are arranged in the order of increasing atomic masses, groups of three elements, having similar chemical properties are obtained. The atomic mass of the middle element of the traid being equal to the arithmetic mean of the atomic masses of the other two elements.

According to octaves when elements are arranged in the order of increasing atomic masses, the properties of eighth element are a repetition of the properties of the first element.

Answer 2

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yes,

the dobereiner first traid , i.e., Li,Na and K also exist in newland's octave.

similarly, if we start the new land's octave with lithium then sodium will be the eighth element, and if we start with Na as first element then potassium will be the eighth element.

it means ,these three elements are included in newland's octave .

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