Compare the present Periodic Table with Mendeleevs original Periodic Table in terms of how it is organized, number of elements, what it looks like, ease of understanding, and information given.
Oh my heavens I am not going to try. Mendelev had no idea of electrons or their arrangements or or how atoms went together and just ordered columns by their chemical properties. It came out amazingly well. I will go look for an article.
Here is a reasonable summary:
http://corrosion-doctors.org/Periodic/Periodic-Mendeleev.htm
To compare the present Periodic Table with Mendeleev's original Periodic Table, let's look at several aspects:
1. Organization:
Mendeleev's original Periodic Table was organized based on increasing atomic mass. He arranged the elements in rows and columns, placing elements with similar properties in the same groups. The present Periodic Table is organized based on increasing atomic number, which reflects the number of protons in an atom's nucleus. It still retains the same concept of arranging elements with similar properties in the same groups but does so based on atomic number rather than mass.
2. Number of Elements:
Mendeleev's original Periodic Table consisted of approximately 60 elements, while the present Periodic Table contains 118 known elements. As new elements have been discovered, they have been incorporated into the table in a systematic manner.
3. Appearance:
Mendeleev's original Periodic Table was relatively simple, with the elements listed in rows and columns. However, the present Periodic Table has a more complex layout due to the inclusion of additional elements. It consists of rows called periods and columns called groups or families. Information about each element is displayed, including atomic number, symbol, atomic mass, and various other properties.
4. Ease of Understanding:
Mendeleev's original Periodic Table was a significant breakthrough at the time, but it did not fully capture the underlying patterns and relationships among the elements. The present Periodic Table provides a more comprehensive and accurate representation of the elements, making it easier to understand their properties and relationships. It incorporates new scientific knowledge and is more detailed and precise.
5. Information Given:
Mendeleev's original Periodic Table provided limited information, mainly focusing on atomic mass and properties. In contrast, the present Periodic Table offers a vast amount of information about each element. It includes atomic number, symbol, atomic mass, electronic configuration, chemical properties, and more. This additional information enables scientists to study and understand the elements in much greater detail.
In summary, the present Periodic Table is a vast improvement over Mendeleev's original table in terms of organization, number of elements, comprehensiveness, and information provided. It reflects our increased understanding of the elements and their properties, enabling scientists to explore and utilize them more effectively.