Question

newland periodic table advantage and limitation​

Answer 1

Safiasaheb Ace

ADVANTAGES:

1. he was the first scientist to show that there was a systematic relationship btw the atomic masses and the properties of elements.

DISADVANTAGES:

1. He said that there only 56 elements in nature and no new elements would be found. but when new elements were found, he had no answer to that.

2. in order to fit all the elements in his table, he put two elements in the same slot which were not similar and was wrong.

3. it was also seen that newland's law of octaves was only applicable upto calcium. the rest did not match in their chemical properties.

Answer 2

Newlands law of octaves states that when the elements are arranged in the order of their increasing atomic masses , every eighth element has properties similar to those of the first.

Limitations of newland's law of octaves:

1) New lands law of octaves i.e. applicable to only the first elements i.e. , only upyog calcium out of total 56 elements known at that time.

2) Newlands placed two elements each in some boxes to accommodate all known elements e.g. Co , and Ni , Ce and La . He placed some elements with different properties under the same note in the octave. For example , Co and Ni under the note Do along with halogens , while Fe having similarity with Co and Ni away from them along with the nonmetals O and S under the note Ti.

3) Newlands octaves did not have provision to accommodate the newly discovered elements.

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