Table of Contents
- 1 What was the main achievements of Newlands law of octaves?
- 2 What are the achievements and limitations of Newlands law of octaves?
- 3 What were the limitations of Newlands law of octaves Class 10?
- 4 What is achievement of dobereiner’s law of triads?
- 5 Why is Newlands law of octaves not applicable after calcium?
- 6 What is Newlands Law of octaves explain with an example?
- 7 What is Newland’s law of octaves?
- 8 Who discovered the law of octaves in chemistry?
What was the main achievements of Newlands law of octaves?
Newland’s law of octaves was also among the early attempts to classify elements on the basis of their atomic weights. It also classified elements with similar properties in the same group – which led to the development of better systems for classification of elements.
What are the achievements and limitations of Newlands law of octaves?
The major limitations were: It applied to only lighter elements having atomic masses up to 40 u, i.e., up to calcium. The first and eighth elements after calcium did not have the same properties. Only 63 elements were considered to exist in nature, and no new elements would be discovered in the future.
What were the successes of Newland’s law of octaves Why did it fail?
The law failed because of the following reasons: 1 The law was applicable only upto calcium. It could not include the other elements beyond calcium. ii With the discovery of rare gases it was the ninth element and not the eighth element having similar chemical properties.
What are the characteristics of Newlands law of octaves?
Newland’s Law of Octaves. The law of octaves states that every eighth element has similar properties when the elements are arranged in the increasing order of their atomic masses.
What were the limitations of Newlands law of octaves Class 10?
Newland’s law of octaves held true only for elements up to calcium. Elements with greater atomic masses could not be accommodated into octaves. The elements that were discovered later could not be fit into the octave pattern.
What is achievement of dobereiner’s law of triads?
Answer:The Achievements of dobereiner’s law of traids were:- Explanation: i)He was able to grouped three elements having similar chemical properties together. ii) The atomic mass of the middle element of the traid being equal to the average of the atomic mass of other two elements.
What is Newlands law of octaves explain with example?
According to Newlands’ law of octaves, when elements are arranged in increasing order of their atomic masses, the properties of the eighth element are a repetition of the properties of the first element. Each horizontal row had 7 elements. For example, let us take a row from Newlands’ classification of elements.
What are the limitations of Newlands octaves?
Limitations of Newland’s Law of Octaves:
- Newland could arrange elements only up to calcium, out of the total 56 elements known.
- After calcium, every eighth element did not possess properties similar to that of the first.
- Only 56 elements were known at the time of Newlands, but later several elements were discovered.
Why is Newlands law of octaves not applicable after calcium?
Newland’s law of octaves was applicable only to lighter elements having atomic masses up to 40 u i.e., up to calcium. After calcium, every eighth element did not possess properties similar to that of the first element.
What is Newlands Law of octaves explain with an example?
Why is it called Newlands Law of octaves?
Answer: In the year 1866, an English scientist, John Newlands arranged the elements in the order of increasing atomic masses. He noticed that every eighth element exhibits similar properties as compared to the first element. He called this law as the ‘Law of Octaves’ better known as ‘Newland’s Law of Octaves’
Which of the following is an achievement of the triads classification?
Achievements of Dobereiner’s triads : The distinctive feature of a triad was the atomic mass of the middle element. When elements were arranged in order of their increasing atomic mass, the atomic mass of the middle element was approximately the arithmetic mean of the other two elements of the triad.
What is Newland’s law of octaves?
On the basis of this observation, Newland’s law of octaves was formulated. The law of octaves states that every eighth element has similar properties when the elements are arranged in the increasing order of their atomic masses.
Who discovered the law of octaves in chemistry?
In chemistry, the law of octaves was proposed by the English chemist J.A.R. Newlands in 1865. Newlands was one of the first to notice a periodic pattern in the elements’ properties and predicted later developments of the periodic law. Newlands Law Was Named the Law of Octaves.
Which of the following is an example of Law of octaves?
An example of the Law of Octaves is lithium, sodium, and potassium; they share physical and chemical properties. Similarly, Mg is the eighth element to be. Hence, both elements share the same physical and chemical properties. The remaining elements after potassium (Cu, Rb, Ag, and a few more) are different.
How many elements did Newland arrange?
Out of the total 56 known elements, Newland could arrange elements only up to calcium. Every eighth element did not show properties similar to that of the first after calcium. Just 56 elements were known at the time of Newlands, but afterwards, various elements were discovered.