Question

Some of the statements related to Newland’s law are given below:

I) This law was true only for first twenty elements.

II) Calcium was the last element up to which it is found successful.

III) It is based on atomic masses and repetition of properties.

The true statements are

a) i and ii
b) ii and iii
c) i and iii
d) i,ii and iii ​

Answer 1

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Detail Answer:

• The Newland's law of octaves for the classification of elements was found to be applicable only up to the element calcium.

• Law of octaves, in chemistry, the generalization made by the English chemist J.A.R. Newlands in 1865 that, if the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of seven elements.

•  Newlands was one of the first to detect a periodic pattern in the properties of the elements and anticipated later developments of the periodic law.

Answer 2

Answer:

option b) ii and iii

Explanation:

according to the above question