Question

А) Обьясните принцип классифткаци хим. Эл. Дж.А.Ньюлендса б) Назовите недостатки этой класификаци. С)определите сходство класификаци Дж.А.Ньюлендса и Д.И.Менделеева.

Answer 1

Знаю токо а
А) Дж.А.Ньюлендс расположил химические элементы в порядке возростанич их атомных мас в результате он заметил что каждый восьмой элемент напоминает по своиствам первый элемент

Answer 2

Explanation of the Classification by J.A. Newlands

The classification of chemical elements by J.A. Newlands is based on the principle that when the elements are arranged in order of increasing atomic weights, certain properties recur at regular intervals. Newlands proposed that every eighth element had similar properties, which he called the Law of Octaves. This principle is similar to the musical octave, where every eighth note has a similar sound. Newlands arranged the elements in rows of seven, and the eighth element would have similar properties to the first, just like the eighth note in an octave has a similar sound to the first note.

J.A. Newlands' classification was based on the Law of Octaves, which stated that when the elements were arranged in order of increasing atomic weights, every eighth element had similar properties. This was a significant step towards the modern periodic table, as it laid the groundwork for the periodic law and the periodic table of elements.

Shortcomings of this Classification

However, there were several shortcomings in Newlands' classification. One major drawback was that the Law of Octaves did not hold true for all elements. While it worked for some elements, it failed for others, especially as the atomic masses increased. This inconsistency made Newlands' classification less reliable and limited its applicability to all known elements at the time.

Another limitation was that Newlands' classification did not leave any gaps for undiscovered elements, unlike Mendeleev's periodic table, which had gaps for elements that were yet to be discovered. This lack of provision for undiscovered elements made Newlands' classification less adaptable to future discoveries in the field of chemistry.

Similarities between Newlands' and Mendeleev's Classifications

Despite their differences, there are some similarities between the classifications of J.A. Newlands and D.I. Mendeleev. Both Newlands and Mendeleev attempted to classify the elements based on their properties and atomic weights. They both recognized the periodicity in the properties of elements and sought to organize them in a systematic manner.

Mendeleev's periodic table, however, was more comprehensive and successful than Newlands' classification. Mendeleev not only arranged the elements in order of increasing atomic weights but also left gaps for undiscovered elements and predicted the properties of these yet-to-be-discovered elements. This foresight and flexibility made Mendeleev's periodic table more accurate and adaptable to future discoveries in the field of chemistry